In order to succeed; we must first believe that we can.
It does not matter how slowly you go as long as you do not stop.
Keep your eyes on the stars; and your feet on the ground.
Always do your best. What you plant now; you will harvest later.
Don't watch the clock; do what it does. Keep going.
Do not wait to strike till the iron is hot; but make it hot by striking.
William Butler Yeats
Ralph Waldo Emerson
P. J. O'Rourke
Henry David Thoreau
George Bernard Shaw