One cannot say of something that it is and that it is not in the same respect at the same time.

The least initial deviation from the truth is multiplied later a thousandfold.

That which is common to the greatest number has the least care bestowed upon it. Every one thinks chiefly of his own, hardly at all of the common interest; and only when he is himself concerned as an individual. For besides other considerations, everybody is more inclined to neglect the duty which he expects another to fulfill.

The continuum is that which is divisible into indivisibles that are infinitely divisible.

Virtue is more clearly shown in the performance of fine ACTIONS than in the non-performance of base ones.

Politicians also have no leisure, because they are always aiming at something beyond political life itself, power and glory, or happiness.

At first he who invented any art that went beyond the common perceptions of man was naturally admired by men, not only because there was something useful in the inventions, but because he was thought wise and superior to the rest. But as more arts were invented, and some were directed to the necessities of life, others to its recreation, the inventors of the latter were always regarded as wiser than the inventors of the former, because their branches of knowledge did not aim at utility.