"We may, indeed, say that the hour of death is uncertain, but when we say this we think of that hour as situated in a vague and remote expanse of time; it does not occur to us that it can have any connexion with the day that has already dawned and can mean that death -- or its first assault and partial possession of us, after which it will never leave hold of us again -- may occur this very afternoon, so far from uncertain, this afternoon whose time-table, hour by hour, has been settled in advance."

Source: In the Shadow of Young Girls in Flower: In Search of Lost Time.