Our age is bent on trying to make the barren tree of skepticism fruitful by tying the fruits of truth on its branches.

Very little of the great cruelty shown by men can really be attributed to cruel instinct. Most of it comes from thoughtlessness or inherited habit. The roots of cruelty, therefore, are not so much strong as widespread. But the time must come when inhumanity protected by custom and thoughtlessness will succumb before humanity championed by thought. Let us work that this time may come.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

An optimist is a person who sees a green light everywhere, while a pessimist sees only the red stoplight... the truly wise person is colorblind.

The great fault of all ethics hitherto has been that they believed themselves to have to deal only with the relations of man to man. In reality, however, the question is what is his attitude to the world and all life that comes within his reach.

It is not enough to merely exist. It's not enough to say, 'I'm earning enough to live and support my family. I do my work well. I'm a good parent.' That's all very well. But you must do something more.

Do something wonderful, people may imitate it.