But one fisherman always had excellent healthy fish to market. Years rolled by and the fisherman died and his son took over the boat. The other fishermen of the village came aboard to ask how the father had always had such healthy fish to market.
The son said not a word, but opened the cover of the wet well. In the dim interior water a very large sea catfish was seen cruising the wet well.
The other fishermen were astonished at the sight and asked 'why a fisherman would keep such a monster in the wet well, didn't it eat some of the catch each trip?'
The new captain smiled and replied that it did eat many of the catch, but the ones not eaten kept swimming to keep from being eaten and thus the exertion kept them healthier than non-active fish. Evil works sort of like that. The Devil gets many, but the ones he doesn't get keep mindful of the Salvation God arranges by His Grace and they revert to it often and with humble hearts ... they keep movin'.