Mathematics alone make us feel the limits of our intelligence. For we can always suppose in the case of an experiment that it is inexplicable because we don't happen to have all the data. In mathematics we have all the data, brought together in the full light of demonstration, and yet we don't understand. We always come back to the contemplation of our human wretchedness. What force is in relation to our will, the impenetrable opacity of mathematics is in relation to our intelligence.

We do injury to a child if we bring it up in a narrow Christianity, which prevents it from ever becoming capable of perceiving that there are treasures of purest gold to be found in non-Christian civilizations. Laical education does an even greater injury to children. It covers up those treasures, and those of Christianity as well.

Human beings are so made that the ones who do the crushing feel nothing; it is the person crushed who feels what is happening. Unless one has placed oneself on the side of the oppressed, to feel with them, one cannot understand.

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.

You could not be born at a better period than the present, when we have lost everything.

The danger is not lest the soul should doubt whether there is any bread, but lest, by a lie, it should persuade itself that it is not hungry.

Two forces rule the universe: light and gravity.