That the expression, “thou hearest its voice,” is used respecting the wind, is clear from this circumstance; He would not, when conversing with an unbeliever and one unacquainted with the operation of the Spirit, have said, “Thou hearest its voice.” As then the wind is not visible, although it utters a sound, so neither is the birth of that which is spiritual visible to our bodily eyes; yet the wind is a body, although a very subtle one; for whatever is the object of sense is body. If then you do not complain because you cannot see this body, and do not on this account disbelieve, why do you, when you hear of “the Spirit,” hesitate and demand such exact accounts, although you act not so in the case of a body? What then doth Nicodemus? still he continues in his low Jewish opinion, and that too when so clear an example has been mentioned to him. Wherefore when he again says doubtingly,