The starting point of all achievement is desire.

The unexamined life is not worth living.

Learn from yesterday, live for today, hope for tomorrow.

Waste no more time arguing about what a good man should be. Be one.

They say Rome wasn't built in a day, but I wasn't on that particular job.

I believe that if you show people the problems and you show them the solutions they will be moved to act.

Don't get set into one form, adapt it and build your own, and let it grow, be like water.

All thinking men are atheists.

Isn't it astonishing that all these secrets have been preserved for so many years just so we could discover them!

You are never too old to become younger!

The superior man thinks only of virtue; the common man thinks only of comfort.

Don't let anyone tell you what you ought to like... Some wines that some experts think are absolutely exquisite don't appeal to me at all.

Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.

Imagination is everything. It is the preview of life's coming attractions.

Courage is the most important of all the virtues, because without courage you can't practice any other virtue consistently. You can practice any virtue erratically, but nothing consistently without courage.

A lot of people have gone further than they thought they could because someone else thought they could

United we stand; divided we fall.

Don't ever take a fence down until you know why it was put up.

All wealth is the product of labor.

You see things; you say, 'Why?' But I dream things that never were; and I say 'Why not?

Impossible is a word to be found only in the dictionary of fools.