Benjamin Disraeli:

The secret of success is constancy to purpose.

Dale Carnegie:

Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.

Frank Lloyd Wright:

I know the price of success: dedication, hard work, and an unremitting devotion to the things you want to see happen.

Henry Wadsworth Longfellow:

The heights by great men reached and kept / Were not attained by sudden flight, / But they, while their companions slept, / Were toiling upward in the night.

Jane Addams:

Nothing could be worse than the fear that one had given up too soon, and left one unexpended effort that might have saved the world.

John Dewey:

Arriving at one point is the starting point to another.

John Quincy Adams:

Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish.

Katherine Mansfield:

E. M. Forster never gets any further than warming the teapot. He's a rare fine hand at that. Feel this teapot. Is it not beautifully warm? Yes, but there ain't going to be no tea.

Lao-Tse:

In this world, there is nothing softer or thinner than water. But to compel the hard and unyielding, it has no equal. That the weak overcomes the strong, that the hard gives way to the gentle -- this everyone knows. Yet no one asks accordingly.

Louis Pasteur:

Let me tell you the secret that has led me to my goal: my strength lies solely in my tenacity.

Marian Wright Edelman:

You're not obligated to win. You're obligated to keep trying to do the best you can every day.

Marian Wright Edelman:

You just need to be a flea against injustice. Enough committed fleas biting strategically can make even the biggest dog uncomfortable and transform even the biggest nation.

Marian Wright Edelman:

Whoever said anybody has a right to give up?

Mary Kay Ash:

Aerodynamically the bumblebee shouldn't be able to fly, but the bumblebee doesn't know that so it goes on flying anyway.

Ovid:

Let your hook always be cast; in the pool where you least expect it, there will be a fish.

Robert Frost:

The best way out is always through.

Sophia Loren:

Getting ahead in a difficult profession requires avid faith in yourself. That is why some people with mediocre talent, but with great inner drive, go much further than people with vastly superior talent.

Stephen Covey:

Effective leadership is putting first things first. Effective management is discipline, carrying it out.

Thomas Alva Edison:

Genius is one percent inspiration and ninety-nine percent perspiration.

Thomas Alva Edison:

Many of life's failures are people who did not realize how close they were to success when they gave up.

Thomas Alva Edison:

Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence, and honest purpose, as well as perspiration. Seeming to do is not doing.

Victor Frankl:

What man actually needs is not a tensionless state but rather the striving and struggling for some goal worthy of him. What he needs is not the discharge of tension at any cost, but the call of a potential meaning waiting to be fulfilled by him.

W. C. Fields:

If at first you don't succeed, try, try again. Then quit. No use being a damn fool about it.

Winston Churchill:

If you're going through hell, keep going.