A man who is convinced of the truth of his religion is indeed never tolerant. At the least, he is to feel pity for the adherent of another religion but usually it does not stop there. The faithful adherent of a religion will try first of all to convince those that believe in another religion and usually he goes on to hatred if he is not successful. However, hatred then leads to persecution when the might of the majority is behind it.
Albert EinsteinEvery day, man is making bigger and better fool-proof things, and every day, nature is making bigger and better fools. So far, I think nature is winning.
Albert EinsteinIf God has created the world, his primary worry was certainly not to make its understanding easy for us
Albert Einstein