I realized early on that success was tied to not giving up. Most people in this business gave up and went to other things. If you simply don't give up, you would outlast the people who came in on the bus with you.

Harrison Ford, actor

 

When I thought I couldn't go on, I forced myself to keep going. My success is based on persistence not luck.

Estee Lauder, entrepreneur

 

An inventor is almost always failing. He tries and maybe fails a thousand times.

Charles F. Kettering, engineer, inventor

 

In business, sometimes, prospects may seem darkest when really they are on the turn. A little more persistence, a little more effort, and what seemed hopeless failure may turn to glorious success.

Elbert Hubbard, writer, editor

 

Life is a grindstone. But whether it grinds you down or polishes you up depends on what you are made of.

Robert Johnson, founder Black Entertainment TV

 

The greatest things ever done on earth have been done little by little.

William Jennings Bryan, politician

 

When you make a mistake, you take your knocks, you learn your lesson, you move on.

President Ronald Reagan

 

Men, like nails, lose their usefulness when they lose direction and begin to bend.

Walter Savage Landor, poet and writer

 

With ordinary talents and extraordinary perseverance all things are attainable.

Sir Thomas Buxton, politician, philanthropist

 

An inventor is simply a person who does not take his education too seriously. He tries and fails maybe a thousand times. If he succeeds once, than he's in.

Charles Kettering, engineer, inventor

 

Obstacles cannot crush me; every obstacle yields to stern resolve.

Leonard da Vinci, painter, sculptor, architect, scientist

 

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

Louis Pasteur, chemist, microbiologist

 

Great is the art of beginning, but greater is the art of ending.

Henry Wadsworth Longfellow. poet

 

The race is not to be the swift, nor the battle to the strong.

Ecclesistes9:11

 

The greater the difficulty, the more glory in surmounting it.

Epicurus, philosopher

 

There are no shortcuts to any place worth going.

Beverly Sills, opera singer

 

get a good idea and stay with it. Dog it, and work at it until it's done, and done right.

Walt Disney, animator, producer

 

Strength is a matter of the made-up mind.

President Theodore Roosevelt

 

Consider the postage stamp: its usefulness consists in the ability to stick to one thing till it gets there.

Josh Billings, humorist

 

You might have to fight a battle more than once to win it.

Margaret Thatcher, former British prime minister

 

Success is never final.

Winston Churchill, former British prime minister