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.

The coward only threatens when he is safe.

How happy he who can still hope to lift himself from this sea of error! What we know not, that we are anxious to possess, and cannot use what we know.

It is working within limits that the craftsman reveals himself.

Many people take no care of their money till they come nearly to the end of it, and others do just the same with their time.

No one has ever learned fully to know themselves.

The greater the knowledge, the greater the doubt.