There are only two things that pierce the human heart. One is beauty. The other is affliction.

Two forces rule the universe: light and gravity.

In order to obey God, one must receive his commands. How did it happen that I received them in adolescence, while I was professing atheism? To believe that the desire for good is always fulfilled - that is faith, and whoever has it is not an atheist.

If we go down into ourselves, we find that we possess exactly what we desire.

The mysteries of faith are degraded if they are made into an object of affirmation and negation, when in reality they should be an object of contemplation.

One could count on one's fingers the number of scientists throughout the world with a general idea of the history and development of their particular science: there is none who is really competent as regards sciences other than his own. As science forms an indivisible whole, one may say that there are no longer, strictly speaking, scientists, but only drudges doing scientific work.

Those who keep the masses of men in subjection by exercising force and cruelty deprive them at once of two vital foods, liberty and obedience; for it is no longer within the power of such masses to accord their inner consent to the authority to which they are subjected. Those who encourage a state of things in which the hope of gain is the principle motive take away from men their obedience, for consent which is its essence is not something which can be sold.