We nourish our souls when we continue to plant seeds of love wherever we go. When we let go of our negative thoughts and forgive ourselves and other people, that's like taking the weeds out of the garden and letting love blossom.
The true source of joy is love -- love of God, love of beauty, love of wisdom, love of another human being, it does not matter which. It is all one love: a joyful awareness of dissolving boundaries of our ordinary narrow self, of being one with the reality beyond, of being made whole.