If I told you earthly things and you don't believe, how will you believe if I tell you heavenly things?

 When we read the story, it looks at first sight as if Nicodemus took the word anew in only the second sense, and with a crude literalism. How can anyone, he said, enter again into his mother's womb and be born a second time when he is already an old man? But there is more to Nicodemus' answer than that. In his heart there was a great unsatisfied longing. It is as if he said with infinite, wistful yearning: "You talk about being born anew; you talk about this radical, fundamental change which is so necessary. I know that it is necessary; but in my experience it is impossible. There is nothing I would like more; but you might as well tell me, a full grown man, to enter into my mother's womb and be born all over again." It is not the desirability of this change that Nicodemus questioned; that he knew only too well; it is the possibility. Nicodemus is up against the eternal problem, the problem of the man who wants to be changed and who cannot change himself. 