... the human heart has a hidden want which science cannot supply.

In the field of observation, chance favors only the prepared minds.

What is needed in the present plight of mankind is not more science but a change of heart that shall move mankind to devote to constructive and peaceful purposes ...

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.

Science is built of facts the way a house is built of bricks; but an accumulation of facts is nor more science than a pile of bricks is a house.

The simplest schoolboy is now familiar with truths for which Archimedes would have given his life.

All science is either physics or stamp collecting.

Science is the key which unlocks the storehouses of nature.

... scientists have made no clear effort to become an important, independently active force of mankind. Whole congresses at a time, they back away from the suffering of others; it is more comfortable to stay within the bounds of science.

Nature is neutral. Man has wrested from nature the power to make the world a desert or to make the deserts bloom. There is no evil in atoms; only in men's souls.