Paul had been teaching in Antioch and then he went on his first missionary journey. This journey lasted about three years. When he returns to Antioch, he finds that the church at Jerusalem had sent messengers up to Antioch. They were sent to tell the Gentiles who had been converted to Christianity that it was necessary for them to be circumcised. Paul had not taught that to the new converts and did not believe that it was necessary. In fact, Paul taught that God did not require new Gentile converts to be circumcised. We still have people in our society who are bound by the traditions that they were taught. We must understand that God the Holy Spirit abides in us. He is our guide and our teacher. We have much liberty in Christ Jesus, but we are not to use that liberty to grieve the Holy Spirit or to mislead others. Jesus said that if you were bound by the law and did not fulfill every iota of the law, then you cold not enter heaven, That is why God sent His Son as the perfect sacrifice for our redemption. From that time forward, there is no sacrifice required. If there were need for more sacrifice, then Christ died in vain..
24 For Christ did not enter a holy place made with hands, a mere copy of the true one, but into heaven itself, now to appear in the presence of God for us; 25 nor was it that He would offer Himself often, as the high priest enters the holy place year by year with blood that is not his own. 26 Otherwise, He would have needed to suffer often since the foundation of the world; but now once at the consummation of the ages He has been manifested to put away sin by the sacrifice of Himself.–Hebrews 9:24-26 (NASB)