Right now my favourite part of the day is the last half hour or so, which is the time I spend fighting the effects of my prescription sleeping pill. I get to ride this wave of sleepy euphoria, where the whirring, clanking machinery inside my head slows down and all of my limbs are loose and relaxed. It’s like being drunk or high, except that it feels very calm and safe — unlike other altered states of consciousness, I know that nothing can go wrong. When I finally do lie down, with the thought that I have several hours of blissful unconsciousness to look forward to, I feel everything draw away from me, my body suspended in a dark sea as I wait for sleep to gather at the edge of the horizon and then come crashing over me.

This is what I look forward to, from the time I wake up until…