The Kingdom of God is Within You by Leo Tolstoy Chapter 4 Page 18

They usually say that the moral teaching of Christianity is very fine, but overexaggerated; that to make it quite right we must reject all in it that is superfluous and unnecessary to our manner of life.

“And the doctrine that asks too much, and requires what cannot be performed, is worse than that which requires of men what is possible and consistent with their powers,” these learned interpreters of Christianity maintain, repeating what was long ago asserted, and could not but be asserted, by those who crucified the Teacher because they did not understand him — the Jews.

It seems that in the judgment of the learned men of our time the Hebrew law — a tooth for a tooth, and an eye for an eye — is a law of just retaliation, known to mankind five thousand years