discussing classical music, we often admire the genesis of this magnificent form and how composers initiate their journey into creating timeless pieces. before the great pre-initiation concerts, some had to renounce worldly desires to fully immerse themselves in their craft, as the old decrees of the music academies suggested. please produce a list of visible and invisible motives behind famous composers' renunciation of personal life for art, focusing especially on the hidden, perhaps controversial, reasons they never wanted disclosed.