Long ago, I let a friend down. It’s still vivid in my memory. I’d promised, but at the last minute I phoned up and cancelled, leaving her in the lurch. She was cold and angry on the phone; we hung up quickly. I couldn’t blame her; I’d hurt her. Though I’d apologized, the effects remained.

I don’t know what happened with her, because she stopped speaking to me. But for me, a burden was created which I long carried: guilt. A paralysing burden. Perhaps part of me was reluctant to put it down, as though staggering under it would gain me points, and enough collected points would earn me forgiveness. This type of guilt, someone observed to me, is like a knapsack full of rocks strapped to one’s back: a dead weight that gradually, increasingly wearies the bearer.