“Regarding the perfection of enthusiasm the Guide to the Bodhisattva’s Way of Life says: “What is enthusiasm? It is delight in virtue.” Enthusiasm is the source of all mundane and supermundane happiness and goodness…. In a few words, you should strive to effectively accomplish all that belongs to the realm of virtue.”
From The Southern Lineage – Stages of the Path to Enlightenment by Je Gendun Jamyang As translated in: The Southern Lineage Lamrim: An Explicit Instruction on the Stages of the Path to Enlightenment – The Abbreviated Commentary Lineage of Manjughosha’s Oral Instructions by Gedun Jamyang, which is included in The Pearl Garland: An Anthology of Lamrims, translated from the Tibetan under Venerable Dagpo Rinpoche’s guidance by Rosemary Patton, Editions Guepele (France)