Austerities performed for sense gratification provide Sukha that is impermanent pleasure. But austerities performed for self-realization provide eternal happiness.
When you distribute Bhagavad Gita, you please the entire parampara, from Krishna to Srila Prabhupada and your spiritual master. This is the success of life.
Krsna wants to address each and every living entity and did so by making Arjuna an instrument to give His instructions for every living entity’s benefit.