Barnes New Testament Notes

Verse 4. How can a man, &c. It may seem remarkable that Nicodemus understood the Saviour literally, when the expression to be born again was in common use among the Jews to denote a change from Gentilism to Judaism by becoming a proselyte by baptism. The word with them meant a change from the state of a heathen to that of a Jew. But they never used it as applicable to a Jew, because they supposed that by his birth every Jew was entitled to all the privileges of the people of God. When, therefore, our Saviour used it of a Jew, when he affirmed its necessity of every man, Nicodemus supposed that there was an absurdity in the doctrine, or something that surpassed his comprehension, and he therefore asked whether it was possible that Jesus could teach so absurd a doctrine -- as he could conceive no other sense as applicable to a Jew -- as that he should, when old, enter a second time into his mother's womb and be born. And we may learn from this --

1st. That prejudice leads men to misunderstand the plainest doctrines of religion.

2nd. That things which are at first incomprehensible or apparently absurd, may, when explained, become clear. The doctrine of regeneration, so difficult to Nicodemus, is plain to a child that is born of the Spirit.

3rd. Those in high rank in life, and who are learned, are often most ignorant about the plainest matters of religion. It is often wonderful that they exhibit so little acquaintance with the most simple subjects pertaining to the soul, and so much absurdity in their views.

4th. A doctrine is not to be rejected because the rich and the great do not believe or understand it. The doctrine of regeneration was not false because Nicodemus did not comprehend it.