Courtesy is the due of man to man; not of suit-of-clothes to suit-of-clothes.

The condition of the most passionate enthusiast is to be preferred over the individual who, because of the fear of making a mistake, won't in the end affirm or deny anything

When new turns of behavior cease to appear in the life of the individual, its behavior ceases to be intelligent.

The man who cannot wonder, who does not habitually wonder (and worship), were he President of innumerable Royal Societies, and carried the whole Mecanique Celeste and Hegel's Philosophy, and the epitome of all Laboratories and Observatories with their results, in his single head, is but a Pair of Spectacles behind which there is no Eye. Let those who have Eyes look through him, then he may be useful.

All men, if they work not as in the great taskmaster's eye, will work wrong, and work unhappily for themselves and for you.

On the whole, I would bid you stand up to your work, whatever it may be, and not be afraid of it; not in sorrows or contradictions to yield, but to push on towards the goal.

The difference between Socrates and Jesus? The great conscious and the immeasurably great unconscious.