It is not enough to have a good mind; the main thing is to use it well.
The greatest power we have is the power of choice.
The most certain sign of wisdom is cheerfulness.
Knowing is not enough, we must apply. Willing is not enough, we must do.
Good means not merely not to do wrong, but rather not to desire to do wrong.
Wise men speak because they have something to say; Fools because they have to say something.
A mistake is always forgivable, rarely excusable and always unacceptable.
Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.
Be silent or let thy words be worth more than silence.
Strength does not come from physical capacity. It comes from an indomitable will.
Everybody is ignorant, only on different subjects.
He who is slowest in making a promise is most faithful in its performance.
Rational discussion is useful only when there is a significant base of shared assumptions.
Don't raise your voice, improve your argument.
Be sure you put your feet in the right place, then stand firm.
It takes a great man to be a good listener.
Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.
I dream. Sometimes I think that's the only right thing to do.
Sometimes you will never know the value of a moment until it becomes a memory.
Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.
Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.