In these trying pandemic times, I’ve been finding a lot of spiritual solace in the sayings of Jacob Zuma’s daughter, Dudu Zuma-Sambudla. Well, not sayings, exactly. Tweets. And not spiritual solace as such, more like that feeling of existential dread you get when you realise that there is no meaning in the world and everything is pointless.

Jean-Paul Sartre, that poster boy for existentialism, called this "nausea" — the feeling you get when you realise that everything is irrational, contingent and unpredictable, and that everything you thought you knew about your existence in the world is a lie...