We notice that the mind is a ...

We notice that the mind is a restless bird; the more it gets the more it wants, and still remains unsatisfied. The more we indulge our passions the more unbridled they become. Our ancestors, therefore, set a limit to our indulgences. They saw that happiness was largely a mental condition. A man is not necessarily happy because he is rich, or unhappy because he is poor.... Millions will always remain poor.
We notice that the mind is a restless bird; the more it gets the more it wants, and still remains unsatisfied. The more we indulge our passions the more unbridled they become. Our ancestors, therefore, set a limit to our indulgences. They saw that happiness was largely a mental condition. A man is not necessarily happy because he is rich, or unhappy because he is poor.... Millions will always remain poor.

Quotes from the same author

Happiness is when what you think, what you say, and what you do are in harmony.
Strength does not come from physical capacity. It comes from an indomitable will.
Be the change that you want to see in the world.
It is unwise to be too sure of one's own wisdom. It is healthy to be reminded that the strongest might weaken and the wisest might err.
It is the quality of our work which will please God, not the quantity.