“Contemplate as follows, ‘After I have generated the spirit of enlightenment for the sake of accomplishing all living beings’ benefit and happiness, I get angry at harmdoers when they obtain happiness on their own. After I have said that I want all beings to become buddhas, I get unhappy when harmdoers get even minimal prosperity or honor. This is extremely contradictory.’ You must eliminate your jealousy regarding any sort of attainment by other persons and delight in it from the depths of your heart. Otherwise your spirit of enlightenment and the achievement of the welfare and happiness of beings are nothing but words.”
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.