The things you do today that you don't have to do will determine who, what, and where you will be when it is too late to do anything about the things you should have done.

Happiness cannot come from without. It must come from within. It is not what we see and touch or that which others do for us which makes us happy; it is that which we think and feel and do, first for the other fellow and then for ourselves.

There is a dangerous optimism of ignorance and indifference.

Gullibility is the key to all adventures. The greenhorn is the ultimate victor in everything; it is he who gets the most out of life.

Make the most of every sense; glory in all the facets of pleasure and beauty which the world reveals to you...

Happiness is the final and perfect fruit of obedience to the laws of life.

Knowledge is happiness, because to have knowledge - broad, deep knowledge - is to know true ends from false, and lofty things from low.