We are all very ignorant. What happens is that not all ignore the same things.

One should guard against preaching to young people success in the customary form as the main aim in life. The most important motive for work in school and in life is pleasure in work, pleasure in its result, and the knowledge of the value of the result to the community.

In the temple of science are many mansions, and various indeed are they that dwell therein and the motives that have led them thither. Many take to science out of a joyful sense of superior intellectual power; science is their own special sport to which they look for vivid experience and the satisfaction of ambition; many others are to be found in the temple who have offered the products of their brains on this altar for purely utilitarian purposes.

Is it not a terrible thing to be forced by society to do things which all of us as individuals regard as abominable crimes?

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

If you want to make your children brilliant, tell them fairy tales. If you want to make them more brilliant, tell them more fairy tales.

The truth of a theory can never be proven, for one never knows if future experience will contradict its conclusions.