Art is the symbol of the two noblest human efforts: to construct and to refrain from destruction.

One of the most exquisite pleasures of human love - to serve the loved one without his knowing it - is only possible, as regards the love of God, through atheism.

The destruction of the past is perhaps the greatest of all crimes.

Who were the fools who spread the story that brute force cannot kill ideas? Nothing is easier. And once they are dead they are no more than corpses.

We cannot take a single step toward heaven. It is not in our power to travel in a vertical direction. If however we look heavenward for a long time, God comes and takes us up.

A science which does not bring us nearer to God is worthless.

Two forces rule the universe: light and gravity.