Bad times have a scientific value. These are occasions a good learner would not miss.

Science does not know its debt to imagination.

Men love to wonder, and that is the seed of science.

Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.

Society is always taken by surprise at any new example of common sense.

The value of a dollar is social, as it is created by society.

In every society some men are born to rule, and some to advise.

Shallow men believe in luck. Strong men believe in cause and effect.

We gain the strength of the temptation we resist.

We acquire the strength we have overcome.