脳が何かに中毒になると、はじめから脳がそのような方（ほう）になってしまって、平素考え、判断する間もなく、肉体がただそのまま行なうようになる。
Once the brain becomes addicted to something, it becomes like that completely. Therefore, the body will do it that way without room to think about it or discern in everyday situations.
photo: 「my brains – let me show you them」by Liz Henry from flickr