The Kingdom of God is Within You by Leo Tolstoy Chapter 2 Page 45

opponent thinks it good, is not a solution of the difficulty. There can only be two solutions: either to find a real unquestionable criterion of what is evil or not to resist evil by force.

The first course has been tried ever since the beginning of historical times, and, as we all know, it has not hitherto led to any successful results.

The second solution — not forcibly to resist what we consider evil until we have found a universal criterion — that is the solution given by Christ. We may consider the answer given by Christ unsatisfactory; we may replace it by another and better, by finding a criterion by which evil could be defined for all men unanimously and simultaneously; we may simply, like savage nations, not recognize the existence of the question.