The only thing that is more expensive than education is ignorance.
Don't halloo until you're out of the wood.
Anyone willing to give up liberty in exchange for security deserves neither.
It might be judged an affront to your understanding should I go about to prove this first principle; the existence of a Diety and that He is the Creator of the universe, for that would suppose you ignorant of what all mankind in all ages have agreed in.
The heart of a fool is in his mouth, but the mouth of a wise man is in his heart.
The cat in gloves catches no mice.