He who sees things grow from the beginning will have the best view of them.

Man perfected by society is the best of all animals; he is the most terrible of all when he lives without law, and without justice.

... the science we are after is not about mathematicals either none of them, you see, is separable.

Friends are an aid to the young, to guard them from error; to the elderly, to attend to their wants and to supplement their failing power of action; to those in the prime of life, to assist them to noble deeds.

In the human species at all events there is a great diversity of pleasures. The same things delight some men and annoy others, and things painful and disgusting to some are pleasant and attractive to others.

To appreciate the beauty of a snow flake, it is necessary to stand out in the cold.

For knowing is spoken of in three ways: it may be either universal knowledge or knowledge proper to the matter in hand or actualising such knowledge; consequently three kinds of error also are possible.