Science becomes dangerous only when it imagines that it has reached its goal.

The moment we face it frankly we are driven to the conclusion that the community has a right to put a price on the right to live in it

Without danger I cannot be great. That is how I pay for Abel's blood. Danger and fear follow my steps everywhere. Without them courage would have no sense. And it is courage, courage, courage that raises the blood of life to crimson splendor.

The reasonable man adapts himself to the world; the unreasonable one persists to adapt the world to himself. Therefore all progress depends on the unreasonable man.

Modern poverty is not the poverty that was blest in the Sermon on the Mount.

In a hospital they throw you out into the street before you are half cured, but in a nursing home they don't let you out till you are dead.

A man's own self is the last person to believe in him, and is harder to cheat than the rest of the world.