Acts 15:9

"and He made no distinction between us and them, cleansing their hearts by faith": So there is only one plan of salvation for all men (Acts 4:12; Mark 16:16). Though Gentiles had not been circumcised, God still accepted them when they believed and were baptized. Notice the word cleansing that the Holy Spirit here selected through Peter. Peter's choice of the word cleansing is because in the back of the dispute was the question of purity, which the Pharisees insisted, came through observance of the Law and circumcision. The real uncleanness of the Gentiles was not in being uncircumcised but in being sinners. When it came to terms of forgiveness, faith and baptism (Acts 2:38) were the terms for both Jews and Gentiles and not circumcision and keeping the Law. Remember, Peter had already commanded Jews to be baptized for the remission of their sins; therefore the word faith in this passage inherently includes conditions such as repentance, confession and baptism.