Everybody in the world is seeking happiness - and there is one sure way to find it. That is by controlling your thoughts. Happiness doesn't depend on outward conditions. It depends on inner conditions.
Dale CarnegieIf you want to be happy, set yourself a goal that commands your thoughts, liberates your energy and inspires your hopes. Happiness is within you. It comes from doing some certain thing into which you can put all your thought and energy. If you want to be happy, get enthusiastic about something.
Dale CarnegieIf we are so contemptibly selfish that we canโt radiate a little happiness and pass on a bit of honest appreciation without trying to screw something out of the other person in returnโif our souls are no bigger than sour crab apples, we shall meet with the failure we so richly deserve.
Dale Carnegie