Either a beast or a god.

-Aristotle
Aristotle

Good has two meanings: it means that which is good absolutely and that which is good for somebody.

Aristotle
Aristotle suggests that the rotating Earth was a generally accepted tenet of Pythagorism: "While most of those who hold that the whole heaven is finite say that the earth lies at the center, the philosophers of Italy, the so-called Pythagoreans, assert the contrary. They say that in the middle there is fire, and that the earth is one of the stars, and by its circular motion round the center produces night and day."
Aristotle

All are agreed that the various moral qualities are in a sense bestowed by nature: we are just, and capable of temperance, and brave, and possessed of the other virtues from the moment of our birth. But nevertheless we expect to find that true goodness is something different, and that the virtues in the true sense come to belong to us in another way. For even children and wild animals possess the natural dispositions, yet without Intelligence these may manifestly be harmful.

Aristotle
Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.
Aristotle

The one exclusive sign of thorough knowledge is the power of teaching.

Aristotle
Quitting smoking is rather a marathon than a sprint. It is not a one-time attempt, but a longer effort
Aristotle

If you prove the cause, you at once prove the effect; and conversely nothing can exist without its cause.

Aristotle
The line has magnitude in one way, the plane in two ways, and the solid in three ways, and beyond these there is no other magnitude because the three are all.
Aristotle

The appropriate age for marrige is around eighteen and thirty-seven for man

Aristotle
That which is excellent endures.