Wild animals never kill for sport. Man is the only one to whom the torture and death of his fellow creatures is amusing in itself.
Instruction does not prevent wasted time or mistakes; and mistakes themselves are often the best teachers of all.
The first duty of an historian is to be on guard against his own sympathies.
The endurance of the inequalities of life by the poor is the marvel of human society.
You cannot dream yourself into a character; you must hammer and forge yourself one.
Science rests on reason and experiment, and can meet an opponent with calmness; but a belief is always sensitive.
