Warren's Letters: https://www.wsj.com/finance/i-read-all-59-of-warren-buffetts-annual-letters-these-are-the-best-parts-068f834a?gaa_at=eafs&gaa_n=AWEtsqebaqF0Ga3pHVFn4Uq-YS6qgmy2etUx97a9myST7RXrJAexyvgdJEwOSr1-BFI%3D&gaa_ts=6903dcab&gaa_sig=kpj-ZSgTpuTeTnUoptqCD0Az_n4eF_NHpsiQQtTbnk_CQYPpzlSBuTwB2CVnizWG9B_Yn1tUbFG_9rKwz0bp9w%3D%3D