2, 3.

Nicodemus professed a full belief in Christ's divine mission.

Why?
It was attested by his miracles.

What answered Christ?
"Well said, O believer ?" No, not a word of this; but the proof of the folly of such a supposition.

'Verily, verily, I say unto thee; except a man be born again, he cannot see the kingdom of God',--that is, he cannot have faith in me.
Ib.p.