“When you rely on patience continually, you do not spoil your joyful attitude, so you are always happy even in this life. Moreover, patience stops miserable rebirths in future lives, gives special rebirths in happy realms, and ultimately bestows certain goodness, so you are utterly happy in this and future lives.”
From The Great Treatise on the Stages of the Path to Enlightenment: The Lam Rim Chen Mo by Tsong Khapa. Translated by the Lamrim Chenmo Translation Committee. Snow Lion/Shambhala Publications.