When I was young I pitied the old. Now old, it is the young I pity.

Far too often the choices reality proposes are such as to take away one's taste for choosing.

I prefer the honest jargon of reality to the outright lies of books.

Science had better not free the minds of men too much, before it has tamed their instincts.

The ideal, without doubt, varies, but its enemies, alas, are always the same.

What scientist would not long to go on living, if only to see how the little truths he has brought to light will grow up?

Truth is always served by great minds, even if they fight it.