Reason now gazes above the realm of the dark but warm feelings as the Alpine peaks do above the clouds. They behold the sun more clearly and distinctly, but they are cold and unfruitful.

The ordinary man is ruined by the flesh lusting against the spirit; the scholar by the spirit lusting too much against the flesh.

A schoolteacher or professor cannot educate individuals, he educates only species.

Pain warns us not to exert our limbs to the point of breaking them. How much knowledge would we not need to recognize this by the exercise of mere reason.

There is a great difference between believing in something and believing in it again.

We are obliged to regard many of our original minds as crazy at least until we have become as clever as they are.

If an angel were to tell us about his philosophy, I believe many of his statements might well sound like '2 x 2= 13'.