When prosperity comes, do not use all of it.

Life's battles don't always go to the stronger or faster man. But sooner or later, the man who wins is the man who thinks he can.

Immoderate desire is the mark of a child, not a man.

We are all born ignorant, but one must work hard to remain stupid

The most certain sign of wisdom is cheerfulness.

Courage, above all things, is the first quality of a warrior.

A perfection of means, and confusion of aims, seems to be our main problem.

We choose our joys and sorrows long before we experience them.

Challenges are gifts that force us to search for a new center of gravity. Don't fight them. Just find a new way to stand.

The ultimate authority must always rest with the individual's own reason and critical analysis.

Unfortunately, the clock is ticking, the hours are going by. The past increases, the future recedes. Possibilities decreasing, regrets mounting.

You can be rich in spirit, kindness, love and all those things that you can't put a dollar sign on.

Rational discussion is useful only when there is a significant base of shared assumptions.

If we do not lay out ourselves in the service of mankind whom should we serve?

Every aquarium will eventually leak.

I think, therefore I am.

Your reputation is in the hands of others. That's what the reputation is. You can't control that. The only thing you can control is your character.

One never notices what has been done; one can only see what remains to be done.

The secret of life, though, is to fall seven times and to get up eight times.

Creativity is the process of having original ideas that have value.

The object of the superior man is truth.