Your phrase likely refers to the popular non-fiction book by Gurcharan Das . Key Themes of the Book
: Das distinguishes between feeling bad about an outcome (regret) and truly feeling the suffering caused to others (remorse). Other Potential Interpretations difficulty
: In piano pedagogy, a "good piece" is often one that matches your current skill level—technically challenging but achievable with consistent practice. Your phrase likely refers to the popular non-fiction