Man, unlike the animals, has never learned that the sole purpose of life is to enjoy it.

Whereas, to borrow an illustration from mathematics, life was formerly an equation of, say, 100 unknown quantities, it is now one of 99 only, inasmuch as memory and heredity have been shown to be one and the same thing.

When the water of a place is bad it is safest to drink none that has not been filtered through either the berry of a grape, or else a tub of malt. These are the most reliable filters yet invented.

Our own death is a premium which we must pay for the far greater benefit we have derived from the fact that so many people have not only lived but also died before us.

Since God himself cannot change the past, He is obliged to tolerate the existence of historians.

The public do not know enough to be experts, but know enough to decide between them.

Flying. Whatever any other organism has been able to do man should surely be able to do also, though he may go a different way about it.