Every memorable act in the history of the world is a triumph of enthusiasm. Nothing great was ever achieved without it because it gives any challenge or any occupation, no mater how frightening or difficult, a new meaning. Without enthusiasm you are doomed to a life of mediocrity but with it you can accomplish miracles

I'd rather learn how to prevent failure than how to gain success, because for what is success other than a state of mind?

No, my son, do not aspire for wealth and labor not only to be rich. Strive instead for happiness, to be loved and to love, and most important to acquire peace of mind and serenity.

A field of clay touched by the genius of man becomes a castle.

For the rest of my life there are two days that will never again trouble me. The first day is yesterday with all its blunders and tears, follies and defeats. Yesterday has passed away, beyond my control forever. The other day is tomorrow with all its pitfalls and threats, its dangers and mystery. Until the sun rises again I have no stake in tomorrow, for it is still unborn.

Already I am smiling in anticipation of the good to come

Take the attitude of a student, never be too big to ask questions, never know too much to learn something new.