It is a natural propensity to attribute misfortune to someone's malignity.

Of all forms of caution, caution in love is perhaps the most fatal to true happiness.

You may reasonably expect a man to walk a tightrope safely for ten minutes; it would be unreasonable to do so without accident for two hundred years.

The rules of logic are to mathematics what those of structure are to architecture.

Thought is merciless to privilege, established institutions, and comfortable habit.

I had supposed until that time that it was quite common for parents to love their children, but the war persuaded me that it is a rare exception. I had supposed that most people liked money better than almost anything else, but I discovered that they liked destruction even better. I had supposed that intellectuals frequently loved truth, but I found here again that not ten per cent of them prefer truth to popularity.

The really useful education is that which follows the direction of the child's own instinctive interests, supplying knowledge for which it is seeking, not dry, detailed information wholly out of relation to its spontaneous desires.