5Then some of the believers who belonged to the party of the Pharisees stood up and said, "The Gentiles must be circumcised and required to obey the law of Moses."
6The apostles and elders met to consider this question. 7After much discussion, Peter got up and addressed them: "Brothers, you know that some time ago God made a choice among you that the Gentiles might hear from my lips the message of the gospel and believe. 8God, who knows the heart, showed that he accepted them by giving the Holy Spirit to them, just as he did to us. 9He made no distinction between us and them, for he purified their hearts by faith. 10Now then, why do you try to test God by putting on the necks of the disciples a yoke that neither we nor our fathers have been able to bear? 11No! We believe it is through the grace of our Lord Jesus that we are saved, just as they are."
12The whole assembly became silent as they listened to Barnabas and Paul telling about the miraculous signs and wonders God had done among the Gentiles through them. 13When they finished, James spoke up: "Brothers, listen to me. 14Simon[a] has described to us how God at first showed his concern by taking from the Gentiles a people for himself. 15The words of the prophets are in agreement with this, as it is written:
16" 'After this I will return
and rebuild David's fallen tent.
Its ruins I will rebuild,
and I will restore it,
17that the remnant of men may seek the Lord,
and all the Gentiles who bear my name,
says the Lord, who does these things'[b]
18that have been known for ages.[c]
19"It is my judgment, therefore, that we should not make it difficult for the Gentiles who are turning to God. 20Instead we should write to them, telling them to abstain from food polluted by idols, from sexual immorality, from the meat of strangled animals and from blood. 21For Moses has been preached in every city from the earliest times and is read in the synagogues on every Sabbath."
30The men were sent off and went down to Antioch, where they gathered the church together and delivered the letter. 31The people read it and were glad for its encouraging message. 32Judas and Silas, who themselves were prophets, said much to encourage and strengthen the brothers. 33After spending some time there, they were sent off by the brothers with the blessing of peace to return to those who had sent them.[d] 35But Paul and Barnabas remained in Antioch, where they and many others taught and preached the word of the Lord.
“Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
“Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen” (St Matthew 28:19-20)
Baptism is a direct commandment of Christ. Verse 20 makes it plain that it is one of the observances that Christ wants of His followers.
It is therefore not optional for Christians: it is a Commandment that must be obeyed. Straight from The Boss Himself: I didn’t make it up.