The only limit to our realization of tomorrow will be our doubts of today.
The most courageous act is still to think for yourself. Aloud.
Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.
He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.
Adapt what is useful, reject what is useless, and add what is specifically your own.
Desire is the very essence of man.
Where there is anger, there is always pain underneath.
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
Generosity is giving more than you can, and pride is taking less than you need.
Knowledge speaks, but wisdom listens
No act of kindness, no matter how small, is ever wasted.
Rational discussion is useful only when there is a significant base of shared assumptions.
The only real mistake is the one from which we learn nothing.
Nobody made a greater mistake than he who did nothing because he could do only a little.
If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.
A single lie destroys a whole reputation of integrity.
The noblest pleasure is the joy of understanding.
What a man does for others, not what they do for him, gives him immortality.
Without courage, wisdom bears no fruit.
Mistakes are always forgivable, if one has the courage to admit them.
The only way to get the best of an argument is to avoid it.