John 3:8
Nicodemus the 'teacher of Israel' struggles to understand the concept of being born again and so Jesus likens it to the wind. No one knows where it comes from and where it goes, yet the sound and effects of it are seen and heard. Trying to fathom the depths of God's wisdom in the manner of the work of salvation in our souls by our own intelligence is fruitless. the secret things belong to God and the revealed things to man. Jesus is the way to God and the way to salvation revealed through Him. One thing is certain in those who are born again, just like the unseen wind, the effects of becoming a new creation in Christ should be clear to see!