Adam Clarke's Commentary on the Bible - John 3:4
How can a man be born when he is old? - It is probable that Nicodemus was pretty far advanced in age at this time; and from his answer we may plainly perceive that, like the rest of the Jews, and like multitudes of Christians, he rested in the letter, without paying proper attention to the spirit: the shadow, without the thing signified, had hitherto satisfied him. Our Lord knew him to be in this state, and this was the cause of his pointed address to him. read more
Adam Clarke's Commentary on the Bible - John 3:3
Jesus answered - Not in the language of compliment: - he saw the state of Nicodemus's soul, and he immediately addressed himself to him on a subject the most interesting and important. But what connection is there between our Lord's reply, and the address of Nicodemus? Probably our Lord saw that the object of his visit was to inquire about the Messiah's kingdom; and in reference to this he immediately says, Except a man be born again, etc. The repetition of amen, or verily, verily, among... read more