Fear is the parent of cruelty.

The solitary side of our nature demands leisure for reflection upon subjects on which the dash and whirl of daily business, so long as its clouds rise thick about us, forbid the intellect to fasten itself.

The best that we can do for one another is to exchange our thoughts freely; and that, after all, is about all.

Experience teaches slowly, and at the cost of mistakes.

Philosophy goes no further than probabilities, and in every assertion keeps a doubt in reserve.

There are epidemics of nobleness as well as epidemics of disease.

The first duty of an historian is to be on his guard against his own sympathies...