Error held as truth has much the effect of truth. In politics and religion this fact upsets many confident predictions.

Doubt is the beginning, not the end, of wisdom.

When we try to imagine a chaos we fail. ... In its very fiber the mind is an order and refuses to build a chaos.

To render aid to the worthless is sheer waste. Rain does not freshen the Dead Sea, but only enables it to dissolve more salt.

We despair of changing the habits of men, still we would alter institutions, the habits of millions of men.

Dumbness and silence are two different things.

Educated folk keep to one another's company too much, leaving other people much like milk skimmed of its cream.