Marvel not that I said unto thee, Ye must be born anew. Nicodemus had revealed, by his expressions of countenance or unrecorded words, his surprise. This further explanation deepened the solemnity of the first assertion by a bold antithesis between the birth of flesh producing nothing but flesh, however high its culture, and the birth of spirit from the Spirit himself, the heavenly and Divine Originator of all genuine repentance, and the sole Cause of the new life.
Nicodemus was clinging more and more eagerly to the old ideas of national privilege, of sacramental purification, of soundly taught principles and habits. He marvelled at such representation which took the heart out of all his previous training.
The Messianic kingdom for which he had been looking and longing seemed to fade away in the clouds of an utter mysticism, and to vanish out of his power of recognition. Our Lord gently reproved the expression of his surprise, and reminded him of the previous utterance, "I said to thee, Ye," etc.
Nicodemus had come in the name of others. Jesus replies, and reasserts the principles for the entire group of persons which Nicodemus might be supposed to represent. We must not fail to notice that, whereas in other parts of the discourse our Lord speaks in the plural first person, yet be discriminates himself from.
others in this statement. He does not say, "We must," etc., but "Ye must," etc. He had no consciousness of personal need of regeneration, nor was he in the first case born as flesh from flesh. His flesh was itself the work of the Spirit.