The wind{The same Greek word (pneuma) means wind, breath, and spirit.} blows where it wants to, and you hear its sound, but don't know where it comes from and where it is going. So is everyone who is born of the Spirit."
(1.) The objection which Nicodemus still made (John 3:9): How can these things be? Christ's explication of the doctrine of the necessity of regeneration, it should seem, made it never the clearer to him. The corruption of nature which makes it necessary, and the way of the Spirit which makes it practicable, are as much mysteries to him as the thing itself; though he had in general owned Christ a divine teacher, yet he was unwilling to receive his teachings when they did not agree with the notions he had imbibed. Thus many profess to admit the doctrine of Christ in general, and yet will neither believe the truths of Christianity nor submit to the laws of it further than they please. Christ shall be their teacher, provided they may choose their lesson. Now here, [1.] Nicodemus owns himself ignorant of Christ's meaning, after all: "How can these things be? They are things I do not understand, my capacity will not reach them." Thus the things of the Spirit of God are foolishness to the natural man. He is not only estranged from them, and therefore they are dark to him, but prejudiced against them, and therefore they are foolishness to him. [2.] Because this doctrine was unintelligible to him (so he was pleased to make it), he questions the truth of it; as if, because it was a paradox to him, it was a chimera in itself. Many have such an opinion of their own capacity as to think that that cannot be proved which they cannot believe; by wisdom they knew not Christ.