No man can ever be greater than his loftiest thoughts.

Some people study all their life, and at death they have learned everything except how to think.

Our virtues are dearer to us the more we have had to suffer for them. It is the same with our children. All profound affection entertains a sacrifice. Our thoughts are often worse than we are, just as they are often better.

Thinkers think and doers do. But until the thinkers do and the doers think, progress will be just another word in the already overburdened vocabulary of the talkers who talk.

Think then act safely.

The revelation of Thought takes men out of servitude into freedom.

Man's greatness lies in his power of thought.

It is astonishing what an effort it seems to be for many people to put their brains definitely and systematically to work.

The brain that bubbles with phrases has hard work to collect its thoughts.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books, They quickly absorb me and banish the clouds from my mind.