John 3:3-6

3:3 Jesus replied, “I tell you the solemn truth, unless a person is born from above, he cannot see the kingdom of God.” 3:4 Nicodemus said to him, “How can a man be born when he is old? He cannot enter his mother’s womb and be born a second time, can he?”

3:5 Jesus answered, “I tell you the solemn truth, unless a person is born of water and spirit, he cannot enter the kingdom of God. 3:6 What is born of the flesh is flesh, and what is born of the Spirit is spirit.

John 3:21

3:21 But the one who practices the truth comes to the light, so that it may be plainly evident that his deeds have been done in God.