Intuition is the source of scientific knowledge.

Most persons think that a state in order to be happy ought to be large; but even if they are right, they have no idea of what is a large and what a small state.... To the size of states there is a limit, as there is to other things, plants, animals, implements; for none of these retain their natural power when they are too large or too small, but they either wholly lose their nature, or are spoiled.

A good style must have an air of novelty, at the same time concealing its art.

There is a cropping-time in the races of men, as in the fruits of the field; and sometimes, if the stock be good, there springs up for a time a succession of splendid men; and then comes a period of barrenness.

When quarrels and complaints arise, it is when people who are equal have not got equal shares, or vice-versa.

God and nature create nothing that does not fulfill a purpose

Hippodamus, son of Euryphon, a native of Miletus, invented the art of planning and laid out the street plan of Piraeus.