CS Lewis from "Learning In Wartime" in "The Weight of Glory".

"The war creates no absolutely new situation: it simply aggravates the permanent human situation so that we can no longer ignore it. Human life has always been lived on the edge of a precipice. Human culture has always had to exist under the shadow of something infinitely more important than itself. If men had postponed the search for knowledge and beauty until they were secure, the search would have never begun. We are mistaken when we compare war to "normal life." Life has never been normal. Even those periods we think most tranquil, like the nineteenth century, turn out on closer inspection, to be full of crises, alarms, difficulties, emergencies. Plausible reasons have never been lacking for putting off all merely cultural activities until some imminent danger has been averted or some crying injustice put right. But humanity long ago chose to neglect those plausible reasons. They propound theorems in beleagured cities, conduct metaphysical arguments in condemned cells, make jokes on scaffolds, discuss poetry while advancing on the walls of Quebec, and comb their hair at Thermopylae. This is not panache; it is our nature."

"It is only our daily bread that we are encouraged to ask for. The present is the only time in which any duty can be done or any grace received."

"What does war do to death? It certainly does not make it more frequent: 100 percent of us die and the percentage cannot be increased. Yet war does do something to death. It forces us to remember it. The only reason that cancer at sixty or paralysis at 75 do not bother us is that we forget them.All schemes of happiness centered in this world were always doomed to final frustration. In ordinary times only a wise man can realize it. Now the stupidest of us knows it."

CS Lewis. The Weight of Glory.