Most people don't know their passion, making 'follow your passion' poor advice. Sam Parr and Shaan Puri explain why following your 'bliss'—sustained enthusiasm for activities where you willingly endure hardship—matters more than chasing a generic dream, and how to identify the repeatable 'loop' that actually energizes you. Joseph Campbell's concept of 'follow your bliss' (not passion) means finding activities where you experience sustained enthusiasm and willingly endure pain—evidenced by 'blisters'—not just momentary happiness.