According to Christian belief, Christians become sons of God through adoption by faith in Jesus Christ. This means that when a person accepts Jesus Christ as their Lord and Savior, they become a part of God's family and are considered His children. This adoption is not based on any particular ethnicity or works of the law, but rather on faith in Jesus Christ. The Bible teaches that through this adoption, Christians receive the Holy Spirit, who helps them to live a life that is pleasing to God and to grow in their relationship with Him.