At what is known as the "first church council,'' described in Acts 15, the decision was definitely made that Gentile Christians were not to be compelled to keep the Jewish ceremonial law. The council sent a letter to the new converts setting them free from all these ceremonial requirements. This was the great burden of Paul's preaching, namely, that we are saved not by keeping the law of Moses but by faith in Christ. Circumcision was the sign of submission to the Mosaic law, and Paul, greatly to the displeasure of the Jews, taught that this was not necessary. The vision of Peter (Acts 10:9-16) while given for the purpose of making him willing to associate intimately with Gentiles, seems also to teach definitely that the Old Testament distinction between clean and unclean meats is no longer in force.