The church of today would be alien to the apostles in the Bible.  These instructions in the letters of the New Testament would not fit into the 21st century church.  Those who read the Bible and assume their church is like this -- is in for a shock and betrayal.

Christian assemblies in the very early church

Acts 2:42-47
They devoted themselves to the apostles’ teaching and to the fellowship, to the breaking of bread and to prayer.  
Everyone was filled with awe, and many wonders and miraculous signs were done by the apostles.  
All the believers were together and had everything in common.  
Selling their possessions and goods, they gave to anyone as he had need.  
Every day they continued to meet together in the temple courts. 
They broke bread in their homes and ate together with glad and sincere hearts,  praising God and enjoying the favor of all the people. 
And the Lord added to their number daily those who were being saved. 

Christians with "One Another"

 Romans 12:10
Be devoted to one another in brotherly love. Honor one another above yourselves.
 Romans 12:16
Live in harmony with one another. Do not be proud, but be willing to associate with people of low position. Do not be conceited.
 Romans 13:8
Let no debt remain outstanding, except the continuing debt to love one another, for he who loves his fellowman has fulfilled the law.
 Romans 14:2
One man’s faith allows him to eat everything, but another man, whose faith is weak, eats only vegetables.
Romans 14:1-3 (in Context) Romans 14 (Whole Chapter)
 Romans 14:5
One man considers one day more sacred than another; another man considers every day alike. Each one should be fully convinced in his own mind.
 Romans 14:13
Therefore let us stop passing judgment on one another. Instead, make up your mind not to put any stumbling block or obstacle in your brother’s way.
 Romans 15:7
Accept one another, then, just as Christ accepted you, in order to bring praise to God.
 Romans 15:14
I myself am convinced, my brothers, that you yourselves are full of goodness, complete in knowledge and competent to instruct one another.
 Romans 16:16
Greet one another with a holy kiss.
 1 Corinthians 1:10
I appeal to you, brothers, in the name of our Lord Jesus Christ, that all of you agree with one another so that there may be no divisions among you and that you may be perfectly united in mind and thought.
 1 Corinthians 6:6
But instead, one brother goes to law against another—and this in front of unbelievers!
 1 Corinthians 7:7
I wish that all men were as I am (celibate). But each man has his own gift from God; one has this gift, another has that.
 1 Corinthians 16:20
All the brothers here send you greetings. Greet one another with a holy kiss.
 2 Corinthians 13:12
Greet one another with a holy kiss.
 Galatians 5:13
You, my brothers, were called to be free. But do not use your freedom to indulge the sinful nature ; rather, serve one another in love.
 Ephesians 4:2
Be completely humble and gentle; be patient, bearing with one another in love.
 Ephesians 4:32
Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
 Ephesians 5:19
Speak to one another with psalms, hymns and spiritual songs. Sing and make music in your heart to the Lord,
 Ephesians 5:21
Submit to one another out of reverence for Christ.
 Colossians 3:13
Bear with each other and forgive whatever grievances you may have against one another. Forgive as the Lord forgave you.
 Colossians 3:16
Let the word of Christ dwell in you richly as you teach and admonish one another with all wisdom, and as you sing psalms, hymns and spiritual songs with gratitude in your hearts to God.
 1 Thessalonians 5:11
Therefore encourage one another and build each other up, just as in fact you are doing.
 Hebrews 3:13
But encourage one another daily, as long as it is called Today, so that none of you may be hardened by sin’s deceitfulness.
 Hebrews 10:24-25
And let us consider how we may spur one another on toward love and good deeds.  Let us not give up meeting together, as some are in the habit of doing, but let us encourage one another—and all the more as you see the Day approaching.
 James 4:11
Brothers, do not slander one another. Anyone who speaks against his brother or judges him speaks against the law and judges it. When you judge the law, you are not keeping it, but sitting in judgment on it.
 1 Peter 1:22
Now that you have purified yourselves by obeying the truth so that you have sincere love for your brothers, love one another deeply, from the heart.
 1 Peter 3:8
Finally, all of you, live in harmony with one another; be sympathetic, love as brothers, be compassionate and humble.
 1 Peter 4:9
Offer hospitality to one another without grumbling.
 1 Peter 5:5
Young men, in the same way be submissive to those who are older. All of you, clothe yourselves with humility toward one another, because, “God opposes the proud but gives grace to the humble.”
 1 Peter 5:14
Greet one another with a kiss of love. Peace to all of you who are in Christ.
 1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.
 1 John 3:11
This is the message you heard from the beginning: We should love one another.
 1 John 3:23
And this is his command: to believe in the name of his Son, Jesus Christ, and to love one another as he commanded us.
 1 John 4:7
Dear friends, let us love one another, for love comes from God. Everyone who loves has been born of God and knows God.
 1 John 4:11
Dear friends, since God so loved us, we also ought to love one another.
 1 John 4:12
No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us.

Christians with "Each Other"

 1 Corinthians 7:5
Do not deprive each other (sexually in marriage) except by mutual consent and for a time, so that you may devote yourselves to prayer. Then come together again so that Satan will not tempt you because of your lack of self-control.
 1 Corinthians 11:33
So then, my brothers, when you come together to eat, wait for each other.
 1 Corinthians 12:25
so that there should be no division in the body, but that its parts should have equal concern for each other.
 Galatians 5:15
If you keep on biting and devouring each other, watch out or you will be destroyed by each other.
 Galatians 5:26
Let us not become conceited, provoking and envying each other.
 Ephesians 4:32
Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
 Philippians 4:2
I plead with Euodia and I plead with Syntyche to agree with each other in the Lord.
 Colossians 3:9
Do not lie to each other, since you have taken off your old self with its practices
 Colossians 3:13
Bear with each other and forgive whatever grievances you may have against one another. Forgive as the Lord forgave you.
 1 Thessalonians 3:12
May the Lord make your love increase and overflow for each other (koinonia) and for everyone else (agape), just as ours does for you.
 1 Thessalonians 4:9
Now about brotherly love we do not need to write to you, for you yourselves have been taught by God to love each other.
 1 Thessalonians 4:18
Therefore encourage each other with these words.
 1 Thessalonians 5:11
Therefore encourage one another and build each other up, just as in fact you are doing.
 1 Thessalonians 5:13
Hold them (elder brethren) in the highest regard in love because of their work. Live in peace with each other (all brethren).
 1 Thessalonians 5:15
Make sure that nobody pays back wrong for wrong, but always try to be kind to each other and to everyone else.
 2 Thessalonians 1:3
We ought always to thank God for you, brothers, and rightly so, because your faith is growing more and more, and the love every one of you has for each other is increasing.
 Hebrews 13:1
Keep on loving each other as brothers.
 James 5:9
Don’t grumble against each other, brothers, or you will be judged. The Judge is standing at the door!
 James 5:16
Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man is powerful and effective.
 1 Peter 4:8
Above all, love each other deeply, because love covers over a multitude of sins.

Jesus' promises to brethren in churches like this

Matthew 25:31-46
 “When the Son of Man comes in his glory, and all the angels with him, he will sit on his throne in heavenly glory. All the nations will be gathered before him, and he will separate the people one from another as a shepherd separates the sheep from the goats. He will put the sheep on his right and the goats on his left.
“Then the King will say to those on his right, ‘Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world.  For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in,  I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me.’
“Then the righteous will answer him, ‘Lord, when did we see you hungry and feed you, or thirsty and give you something to drink?  When did we see you a stranger and invite you in, or needing clothes and clothe you?  When did we see you sick or in prison and go to visit you?’  “The King will reply, ‘I tell you the truth, whatever you did for one of the least of these brothers of mine (Christians), you did for me.'

 “Then he will say to those on his left, ‘Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels.  For I was hungry and you gave me nothing to eat, I was thirsty and you gave me nothing to drink,  I was a stranger and you did not invite me in, I needed clothes and you did not clothe me, I was sick and in prison and you did not look after me.’   
“They also will answer, ‘Lord, when did we see you hungry or thirsty or a stranger or needing clothes or sick or in prison, and did not help you?’   “He will reply, ‘I tell you the truth, whatever you did not do for one of the least of these, you did not do for me.’   “Then they will go away to eternal punishment, but the righteous to eternal life.” 

Luke 6:41-42
 “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye?  How can you say to your brother, ‘Brother, let me take the speck out of your eye,’ when you yourself fail to see the plank in your own eye? You hypocrite, first take the plank out of your eye, and then you will see clearly to remove the speck from your brother’s eye."

The above instructions are only for brethren in the faith, whom we are to correct and reprove.  Unbelievers are only neighbors and are not to be judged at all.  Jesus did not reprove any of the Roman unbelievers, despite their brutality and injustice.

However, God comes first

1 Corinthians 5:1-13

   5 It is actually reported that sexual immorality exists among you, and of a kind that is not found even among the gentiles. A man is actually living with his father’s wife! ² And you are being arrogant instead of being filled with grief and seeing to it that the man who did this is removed from among you. ³ Even though I am away from you physically, I am with you in spirit. I have already passed judgment on the man who did this, as though I were present with you. ⁴ In the name of our Lord Jesus, when you are gathered together (and I am there in spirit), and the power of our Lord Jesus is there, too, ⁵ turn this man over to Satan for the destruction of his body, so that his spirit may be saved on the Day of the Lord.
   ⁶ Your boasting is not good. You know that a little yeast leavens the whole batch of dough, don’t you? ⁷ Get rid of the old yeast so that you may be a new batch of dough, since you are to be free from yeast. For the Messiah, our Passover, has been sacrificed. ⁸ So let’s keep celebrating the festival, neither with old yeast nor with yeast that is evil and wicked, but with yeast-free bread that is both sincere and true.
   ⁹ I wrote to you in my letter to stop associating with people who are sexually immoral— ¹⁰ not at all meaning the people of this world who are immoral, greedy, robbers, or idolaters. In that case you would have to leave this world. ¹¹ But now I am writing to you to stop associating with any so-called brother if he is sexually immoral, greedy, an idolater, a slanderer, a drunk, or a robber. You must even stop eating with someone like that. ¹² After all, is it my business to judge outsiders? You are to judge those who are in the community, aren’t you? ¹³ God will judge outsiders. “Expel that wicked man.”

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