In all our academies we attempt far too much. ... In earlier times lectures were delivered upon chemistry and botany as branches of medicine, and the medical student learned enough of them. Now, however, chemistry and botany are become sciences of themselves, incapable of comprehension by a hasty survey, and each demanding the study of a whole life, yet we expect the medical student to understand them. He who is prudent, accordingly declines all distracting claims upon his time, and limits himself to a single branch and becomes expert in one thing.

If you wish a wise answer, you must put a rational question.

Could we perfect human nature, we might also expect a perfect state of things.

Then to the depths! - I could as well say height: It's all the same.

We should know mankind better if we were not so anxious to resemble one another.

When you praise someone you call yourself his equal.

Love, whose power youth feels, is not suitable for the elderly, just as little as anything that presupposes productivity. It is rare that productivity lasts through the years.