“And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life” (1 Joh 5:11-12). You may know if you are a Christian or not. If Jesus dwells in you, you are a true believer. If Jesus does not dwell in you, you are not yet a Christian.