To be conscious that you are ignorant of the facts is a great step to knowledge.

Enthusiasm is the mother of effort, and without it nothing great was ever achieved.

To accomplish great things, we must not only act, but also dream not only plan, but also believe.

Most people say that it is the intellect which makes a great scientist. They are wrong: it is character.

All great and beautiful work has come of first gazing without shrinking into the darkness.

Great things are not accomplished by those who yield to trends and fads and popular opinion.

To walk around with an ego is a bad thing. To have confidence in yourself is a great thing.

The greatest way to live with honor in this world is to be what we pretend to be.

Many great actions are committed in small struggles.

The greatest discovery of all time is that a person can change his future by merely changing his attitude.