"The alternative to optimism is not pessimism, which can be equally delusional. What we need here is some realism, or the simple admission that, to paraphrase a bumper sticker, “stuff happens,” including sometimes very, very bad stuff. We don’t have to dwell incessantly on the worst-case scenarios — the metastasis, the market crash or global pandemic — but we do need to acknowledge that they could happen and prepare in the best way we can. Some will call this negative thinking, but the technical term is sobriety."