Jesus answered him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.” Nicodemus said to him, “How can a man be born when he is old? Can he enter a second time into his mother's womb and be born?” Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God. ~John 3:3-5 ESV
The rebirth that God’s people endure is completely spiritual. It is just as true and real as our natural births into mankind. Nicodemus was a great teacher of God’s laws and still didn’t understand this principle. Jesus makes His statement very clearly in this situation. The only way to know God and have eternal life is to be born twice. We must be born of water (natural birth) and of the Spirit (rebirth after accepting Christ.)
When Christians forget this essential truth it affects our witness. If we don’t keep in the forefront of our minds that everyone must be born again to enter heaven, we may not be so fervent in our efforts to spread the message of salvation through Jesus Christ. If you have truly accepted Christ you have been reborn. Now it is up to you and all of us to spread this message. There is only one way to know God. You must be born again.