Mentioned in the bible - John 3:1-21, John 7:50-52, John 19:38-42.
Jesus replied, "Very truly I tell you, no one can see the kingdom of God unless they are born again." "How can someone be born when they are old?" Nicodemus asked. "Surely they cannot enter a second time into their mother's womb to be born!" (NIV)
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. For God did not send his Son into the world to condemn the world, but to save the world through him. (NIV)
Nicodemus was a Pharisee and a member of the Sanhedrin
He stood up for Jesus when the Pharisees were conspiring against him: Nicodemus, who had gone to Jesus earlier and who was one of their own number, asked, "Does our law condemn a man without first hearing him to find out what he has been doing?" John 7:50-51,
He helped Joseph of Arimathea take Jesus' body down from the cross and lay it in a tomb, at great risk to his safety and reputation.
Nicodemus also donated 75 pounds of expensive myrrh and aloes to anoint Jesus' body after Jesus died.
Nicodemus had a wise, inquiring mind. He was not satisfied with the laws of the Pharisees.
He had great courage. He personally sought out Jesus to ask questions and get the truth directly from Jesus' mouth.
He also defied the Sanhedrin and Pharisees by treating Jesus' body with dignity and assuring that he received a proper burial.
When he first sought out Jesus, Nicodemus went at night, so no one would see him. He was afraid of what might happen if he spoke to Jesus in broad daylight, where people might report him.
Nicodemus would not rest until he found the truth. He wanted badly to understand, and he sensed that Jesus had the answer. After he became a follower, his life was changed forever. He never hid his faith in Jesus again. Jesus is the source of all truth, the meaning of life. When we are born again, as Nicodemus was, we should never forget that we have forgivness of our sins and eternal life because of Christ's sacrifice for us.