The things you think about determine the quality of your mind.

Asia and Europe are corners in the Universe; every sea, a drop in the Universe; Mount Athos, a clod of earth in the Universe; every instant of time, a pin-prick of eternity. All things are petty, easily changed, vanishing away. All things come from that other world, starting from that common governing principle, or else are secondary consequences of it.

Every man is worth just so much as the things about which he busies himself.

It is in your own power to maintain the beauty of your soul, or to be a decent human being.

The universe is flux, life is opinion.

Love the art, poor as it may be, that thou hast learned, and be content with it; and pass through the rest of life like one who has intrusted to the gods with his whole soul all that he has, making thyself neither the tyrant nor the slave of any man.

The best revenge is not to be like your enemy.

When people injure you, ask yourself what good or harm they thought would come of it. If you understand that, you'll feel sympathy rather than outrage or anger. Your sense of good and evil may be the same as theirs, or near it, in which case you have to excuse them. Or your sense of good and evil may differ from theirs. In which case they're misguided and deserve your compassion. Is that so hard?

Think of your many years of procrastination; how the gods have repeatedly granted you further periods of grace, of which you have taken no advantage. It is time now to realise the nature of the universe to which you belong, and of that controlling Power whose offspring you are; and to understand that your time has a limit set to it. Use it, then, to advance your enlightenment; or it will be gone, and never in your power again.