What we know is not capable of being otherwise; of things capable of being otherwise we do not know, when they have passed outsideour observation, wh….

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

Saying the words that come from knowledge is no sign of having it..

And yet the true creator is necessity, which is the mother of invention..

Of the modes of persuasion furnished by the spoken word there are three kinds. The first kind depends on the personal character ofthe speaker; the se….

Health is a matter of choice, not a mystery of chance.

Happiness is activity..

Also our fellow competitors, who are indeed the people just mentioned - we do not compete with men who lived a hundred centuries ago, or those yet no….

The most important relationship we can all have is the one you have with yourself, the most important journey you can take is one of self-discovery. ….

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 s….

We are better able to study our neighbours than ourselves, and their actions than our own..

The right constitutions, three in number- kingship, aristocracy, and polity- and the deviations from these, likewise three in number - tyranny from k….

No one chooses what does not rest with himself, but only what he thinks can be attained by his own act..

There is nothing grand or noble in having the use of a slave, in so far as he is a slave; or in issuing commands about necessary things. But it is an….

But is it just then that the few and the wealthy should be the rulers? And what if they, in like manner, rob and plunder the people, - is this just?.

Our characters are the result of our conduct..

It is a part of probability that many improbable things will happen..

The secret to humor is surprise..

It is no part of a physician's business to use either persuasion or compulsion upon the patients..

Law is mind without reason..

The family is the association established by nature for the supply of men's everyday wants..