Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.

Keep your face to the sunshine and you cannot see a shadow.

To me a lush carpet of pine needles or spongy grass is more welcome than the most luxurious Persian rug.

Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing.

We could never learn to be brave and patient, if there were only joy in the world.

I do not want the peace which passeth understanding, I want the understanding which bringeth peace.

It is wonderful how much time good people spend fighting the devil. If they would only expend the same amount of energy loving their fellow men, the devil would die in his own tracks of ennui.

It's wonderful to climb the liquid mountains of the sky. Behind me and before me is God and I have no fears.

I seldom think about my limitations, and they never make me sad. Perhaps there is just a touch of yearning at times but it is vague, like a breeze among flowers.

Science may have found a cure for most evils but it has found no remedy for the worst of them all - the apathy of human beings.