Deuteronomy 28:17-19 says, "Perhaps there is among you a man, woman, family, or tribe, whose heart strays this day from the Lord, our God, to go and worship the deities of the idolatrous nations. Perhaps there is among you a root that produces hemlock and wormwood.  And it will be, when he hears the words of this creed, that he will bless himself in his heart, saying, 'I will have peace, even if I follow my heart's desires,' in order to add the punishment for the unintentional sins of this man to that of his intentional sins.  The Lord will not be willing to forgive him; rather, then, the Lord's fury and His zeal will fume against that man."

As Christianity corporately spread, we needed to have creeds that describe essential Christianity, without which all manner of Satan's lies could crowd into the churches.  Love and trust would be wiped out.  Here's several of these creeds. 

English translation of the Armenian translation of the Nicean Creed of 325 A.D.

We believe in one God, the Father Almighty, the maker of heaven and earth, of things visible and invisible.  

And in one Lord Jesus Christ, the Son of God, the begotten of God the Father, the Only-begotten, that is of the essence of the Father. God of God, Light of Light, true God of true God, begotten and not made; of the very same nature of the Father, by Whom all things came into being, in heaven and on earth, visible and invisible.  Who for us humanity and for our salvation came down from heaven, was incarnate, was made human, was born perfectly of the holy virgin Mary by the Holy Spirit.

By whom He took body, soul, and mind, and everything that is in man, truly and not in semblance.  He suffered, was crucified, was buried, rose again on the third day, ascended into heaven with the same body, [and] sat at the right hand of the Father.  He is to come with the same body and with the glory of the Father, to judge the living and the dead; of His kingdom there is no end.

We believe in the Holy Spirit, in the uncreated and the perfect; Who spoke through the Law, prophets, and Gospels; Who came down upon the Jordan, preached through the apostles, and lived in the saints.

We believe also in only One, Universal, Apostolic, and [Holy] Church; in one baptism in repentance, for the remission, and forgiveness of sins; and in the resurrection of the dead, in the everlasting judgment of souls and bodies, and the Kingdom of Heaven and in the everlasting life

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Here's the history of the Nicene Creed.
Here's the history of the Apostle's Creed.
They are very similar.

  Everyone coming into the church or coming of age in the church should read one of these aloud in front of witnesses. Tell them to read it silently and then read aloud what they agree with.  If someone can't read, then read it to them sentence at a time, giving them a second to state they agree.  If someone is too drugged or drunk to understand it, they will have a chance later. If someone drops out of the church for over three years, they need to go through this again on coming back.

In an emergency or chaos, the important part of this can be asked & answered quickly; "Is Jesus Christ of Nazareth your only savior and master?"  If they say 'no', refuse to answer, make an irrelevant statement or pause in answering for over three seconds, take it as a 'no'.  They can be treated as a neighbor but not as a brother. "Do not associate with anyone who claims to be a believer yet indulges in sexual sin, or is greedy, or worships idols, or is abusive, or is a drunkard, or cheats people. Do not even have a meal with such a one."
   1 Corinthians. 5:12,  Deuteronomy 13:5-6