There are no watertight compartments in our inmost nature.
Providing for one's family as a good husband and father is a watertight excuse for making money hand over fist. Greed may be a sin, exploitation of other people might, on the face of it, look rather nasty, but who can blame a man for 'doing the best' for his children?
We really have to get going," Sam said. "Can we leave the car here and pick it up later?" The monk said, "Does a dog have a Buddha nature?" Does a fish have a watertight asshole?" said Coyote.