The degree of complications and unhappiness in a person's life corresponds to the degree to which he dwells on the way he thinks the world ought to be rather than the way it really is. and being grateful it isn't worse, while trying to make it better.

Can you buy friendship? You not only can, you must. It's the only way to obtain friends. Everything worthwhile has a price.

You can never be free until you develop the mental strength to stop fretting over things you cannot control.

There's a basic human weakness inherent in all people which tempts them to bitterly want what they can't have and ungratefully not want what is readily available to them.

When you take action, particularly bold action, the boundaries of what you believe to be possible (your belief system) expand. Which, in turn, gives you the capacity to consider new ideas, new possibilities, and new concepts that you previously thought to be impossible.

Question everything, even if it represents generations of conventional wisdom.

Don't become a slave to non-crucial matters.