In the nature of our existence, we must act to achieve values. And in order to act appropriately, we need to value the beneficiary of our actions. In order to seek values, we must consider ourselves worthy of enjoying them. In order to fight for our happiness, we must consider ourselves worthy of happiness.
Nathaniel Brandens Self-Esteem Every Day: Reflections on Self-Esteem and Spirituality (ed. Simon and Schuster, 1998) - ISBN: 9780684833385