If you want to be happy, be.
It is a great mitzvah to be happy always.
The amount of happiness that you have depends on the amount of freedom you have in your heart.
Most people are about as happy as they make up their minds to be.
If you want to be happy, set a goal that commands your thoughts, liberates your energy, and inspires your hopes.
Hope is itself a species of happiness, and perhaps, the chief happiness which this world affords.