"Knowing is not enough, we must apply. Willing is not enough, we must do." 
Johann von Goethe

"A man’s worth is no greater than the worth of his ambitions."
 Marcus Aurelius Antoninus

"If you can keep your head when all about you are losing theirs and blaming it on you…you’ll be a Man, my son!"
 Rudyard Kipling

"Never, never, never give up. In his later years, Winston Churchill was asked to give the commencement address at Oxford University. Following his introduction, he rose, went to the podium, and said the above words. Then he took his seat."

"If a man can build a better book, preach a better sermon, or make a better mousetrap than his neighbor, though he builds his house in the woods, the world will make a beaten path to his door."
 Ralph Waldo Emerson

"The world is divided into people who do things and people who get the credit. Try, if you can, to belong to the first class. There’s far less competition. Dwight Morrow
You don’t learn to hold your own in the world by standing on guard, but by attacking and getting well hammered yourself."
 George Bernard Shaw

"The only way to enjoy anything in this life is to earn it first." 
Ginger Rogers

"The fireworks begin today, each diploma is a lighted match. Each one of you is a fuse."
 Edward I. Koch

"True education doesn’t merely bring us learning, but love of learning, not merely work, but love of work."
 Author Unknown