"Our greatest glory is not in never falling, but in rising every time we fall"
- Confucius
"they can because they think they can"
- Virgil
"We are what we repeatedly do. Excellence, therefore, is not an act but a habit."
- Aristotle
"Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude."
- Thomas Jefferson
"Success is the sum of small efforts, repeated day in and day out."
- Robert Collier
"The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack in will."
- Vince Lombardi
"Impatience never commanded success."
- Edwin H. Chapin
"You cannot plough a field by turning it over in your mind."
- Author Unknown
"He who hesitates is lost."
- Proverb
"Nothing great was ever achieved without enthusiasm."
- Ralph Waldo Emerson
"Nothing contributes so much to tranquilize the mind as a steady purpose--
a point on which the soul may fix its intellectual eye."
- Mary Shelley
And my personal favorite...
"We are still masters of our fate. We are still captains of our souls."
- Winston Churchill