The detective counterquestion

You should know, there's a right moment for everything. For plants, when to plant them, when to water them, when to harvest them; for animals, when to feed them, when to milk them, when to slaughter them; for children, when to make them, when to nurse them, when to kick them out on their own; for fingernails, when to cut them, when to file them, when to polish them; and hair, too, very important. But only a very few know how important the right moment is for the detective counterquestion.

— from Brenner and God, by Wolf Haas.