Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

Anyone who has never made a mistake has never tried anything new.

Everything that is really great and inspiring is created by the individual who can labor in freedom.

He is considered successful in our day who gets more out of life than he puts in. But a man of value will give more than he receives.

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

Once we accept our limits, we go beyond them.

Logic will get you from A to B. Imagination will take you everywhere.