Jesus answered him, "Most assuredly, I tell you, unless one is born anew,{The word translated "anew" here and in John 3:7 (anothen) also means "again" and "from above".} he can't see the Kingdom of God."
[a.] The author of this blessed change, and who it is that works it. To be born again is to be born of the Spirit, John 3:5-8. The change is not wrought by any wisdom or power of our own, but by the power and influence of the blessed Spirit of grace. It is the sanctification of the Spirit (1 Peter 1:2) and renewing of the Holy Ghost, Titus 3:5. The word he works by is his inspiration, and the heart to be wrought on he has access to.