The mother...swinging the children by pulling on a length of string, while at the same time she kept and eye on them with that protective watchfulness, half animal, half angelic, which is the quality of motherhood.

To sum up all, let it be known that science and religion are two identical words. The learned do not suspect this, no more do the religious. These two words express the two sides of the same fact, which is the infinite. Religion-Science, this is the future of the human mind.

Slaves would be tyrants were the chance theirs.

Whenever a man's friends begin to compliment him about looking young, he may be sure that they think he is growing old.

A day will come when markets, open to trade, and minds, open to ideas, will become the sole battlefield.

The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant.

It is the essence of truth that it is never excessive. Why should it exaggerate? There is that which should be destroyed and that which should be simply illuminated and studied. How great is the force of benevolent and searching examination! We must not resort to the flame where only light is required.