It is easy to assume a habit; but when you try to cast it off, it will take skin and all.
Men who have much to say use the fewest words.
It strains a man's philosophy the worst kind to laugh when he gets beat.
Theory looks well on paper, but does not amount to anything without practice.
Be kind to your mother-in-law, but pay for her board at some good hotel.
Metaphysics is the science of proving what we don't understand.