Man is the artificer of his own happiness.
Henry David Thoreau
The foolish man seeks happiness in the distance, the wise grows it under his feet.
It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.
Thousands of candles can be lighted from a single candle, and the life of the candle will not be shortened. Happiness never decreases by being shared.
He is the happiest, be he king or peasant, who finds peace in his home.
Johann Wolfgang von Goethe