Because the brain doesn’t age, although its ideas about the world may harden and there’s a greater tendency to run off at the mouth about how things were in the good old days. (I was spared that, at least, because most of my so-called good old days had been spent as a full-bore, straight-on-for-Texas drug addict.) I think for most people, life’s deceptive deliriums begin to fall away after fifty.
