To be ignorant of motion is to be ignorant of nature

The character which results from wealth is that of a prosperous fool.

Emotions of any kind are produced by melody and rhythm; therefore by music a man becomes accustomed to feeling the right emotions; music has thus the power to form character, and the various kinds of music based on various modes may be distinguished by their effects on character.

Laughter is a bodily exercise, precious to Health

The line between lawful and unlawful abortion will be marked by the fact of having sensation and being alive.

It is evident that the state is a creation of nature, and that man is by nature a political animal.

When you have thrown a stone, you cannot afterwards bring it back again, but nevertheless you are responsible for having taken up the stone and flung it, for the origin of the act was within you. Similarly the unjust and profligate might at the outset have avoided becoming so, and therefore they are so voluntarily, although when they have become unjust and profligate it is no longer open to them not to be so.