Newton did not know what happened to the apple, and I can prove this when the next eclipse comes.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

As to science, we may well define it for our purpose as "methodical thinking directed toward finding regulative connections between our sensual experiences".

It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception.

I am strongly drawn to a frugal life and am often oppressively aware that I am engrossing an undue amount of the labor of my fellow men.

The man who regards his own life and that of his fellow-creatures as meaningless is not merely unfortunate but almost disqualified for life.

Well-being and happiness never appeared to me as an absolute aim. I am even inclined to compare such moral aims to the ambitions of a pig.