Expositor's Bible Commentary Commentary John 3:8

"The wind bloweth where it will, and thou hearest the voice thereof, but knowest not whence it cometh, and whither it goeth: so is every one that is born of the Spirit." — John 3:8 (ASV)

Jesus asserted that the entrance into the kingdom of God that Nicodemus desired could not be achieved by legalism or outward conformity. It requires an inner change and is given only by the direct act of God. Just as the origin and the destination of the wind are unknown to the one who feels it, similarly the new life of one born of the Spirit is unexplainable by ordinary reasoning; and its outcome is unpredictable, though its actuality is undeniable.