I do all the evil I can before I learn to shun it? Is it not enough to know the evil toh shun it? If not, we should be sincere enough to admit that we love evil too well to give it up.

Whosoever is delighted in solitude is either a wild beast or a god.

Courage is a mean with regard to fear and confidence.

I've been here before and will come again, but I'm not going this trip through.

If you have a particular faith or religion, that is good. But you can survive without it.

The world is the great gymnasium where we come to make ourselves strong.

Democracy is when the indigent, and not the men of property, are the rulers.

One might think that the money value of an invention constitutes its reward to the man who loves his work. But... I continue to find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

We keep moving forward, opening new doors, and doing new things, because we are curious and curiosity keeps leading us down new paths.

Do not cry, new wishes, new dreams will take place. The unspent years of joy will happen and there will be no sorrow left.

I don't like to repeat success, I like to go on to other things.

Did the concept of God evolve from our awe for aliens?