4-1a4a Even if you revisit ‘the same conversation’ (or ‘re-reading a book’) they are never the same thing twice because you are never the same 4-1a4b2a1.1 Silence can give ideas space 4-1a4b2a2 忘却 = 自然に廃棄すること 4-1a4b2a3 整理 = 意識的にすてること