Never, never, never quit.

The average person puts only 25% of his energy and ability into his work. The world takes off its hat to those who put in more than 50% of their capacity, and stands on its head for those few and far between souls who devote 100%.

You have to be burning with an idea, or a problem, or a wrong that you want to right. If you're not passionate enough from the start, you'll never stick it out.

I can't imagine a person becoming a success who doesn’t give this game of life everything he’s got.

When you’re committed to something, you accept no excuses; only results.

Continuous effort — not strength or intelligence — is the key to unlocking our potential.

Money grows on the tree of persistence.

To remain indifferent to the challenges we face is indefensible. If the goal is noble, whether or not it is realized within our lifetime is largely irrelevant. What we must do therefore is to strive and persevere and never give up.

Good, better, best. Never let it rest. 'Til your good is better and your better is best.