Being a Christian does not simply mean going to church. A true believer of God has the standards of Christ and lives to impress God every day and not man.
As a Christian, there are battles you must win privately. You cannot say you’re a Christian, living for God, and still get overwhelmed by the flesh. Everyone has legal appetites and impulses of the carnal nature but a true follower of Christ cannot satisfy them in an illegal way.
Romans 8:13 For if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live.