Science is nothing but perception.

Of all the animals, the boy is the most unmanageable.

If there is a good and wise God, then there also exists a progress of humanity toward perfection.

Ignorance of all things is an evil neither terrible nor excessive, nor yet the greatest of all; but great cleverness and much learning, if they be accompanied by a bad training, are a much greater misfortune.

For the man who makes everything that leads to happiness, or near to it, to depend upon himself, and not upon other men, on whose good or evil actions his own doings are compelled to hinge,--such a one, I say, has adopted the very best plan for living happily. This is the man of moderation; this is the man of manly character and of wisdom.

The wise man will want to be ever with him who is better than himself.

The rulers of the state are the only persons who ought to have the privilege of lying, either at home or abroad; they may be allowed to lie for the good of the state.