A statesman cannot afford to be a moralist.
Every state begins in compulsion; but the habits of obedience become the content of conscience, and soon every citizen thrills with loyalty to the flag. The citizen is right; for however the state begins, it soon becomes an indispensable prop to order.
Never mind your happiness; do your duty.
Tolerance grows only when faith loses certainty; certainty is murderous.
Those who know nothing about history are doomed forever to repeat it.
Science tells us how to heal and how to kill; it reduces our death rate in retail and then kills us wholesale in war; but only wisdom - desire coordinated in the light of all experience - can tell us when to heal and when to kill.