As for literature, thefts cannot harm it, while the lapse of ages augments its value

From Alexander the Platonic, not frequently nor without necessity to say to any one, or to write in a letter, that I have no leisure; nor continually to excuse the neglect of duties required by our relation to those with whom we live, by alleging urgent occupations.

Because a thing seems difficult for you, do not think it impossible for anyone to accomplish.

I cannot comprehend how any man can want anything but the truth.

Let every action aim solely at the common good.

No matter what anyone says or does, my task is to be emerald, my color undiminished.

Run down the list of those who felt intense anger at something: the most famous, the most unfortunate, the most hated, the most whatever: Where is all that now? Smoke, dust, legend...or not even a legend. Think of all the examples. And how trivial the things we want so passionately are.