On Second Meanings

Here's a fun quote from C.S. Lewis on a possible second meaning behind the aggressive imprecation of Psalm 137 -

From this point of view [reading second meanings into the text] I can use even the horrible passage in 137 about dashing the Babylonian babies against the stones. I know things in the inner world which are like babies; the infantile beginnings of small indulgences, small resentments, which may one day become dipsomania or settled hatred, but which woo us and wheedle us with special pleadings and seem so tiny, so helpless that in resisting them we feel we are being cruel to animals. They begin whimpering to us "I don't ask much, but", or "I had at least hoped", or "you owe yourself some consideration". Against all such pretty infants (the dears have such winning ways) the advice of the Psalm is the best. Knock the little bastards' brains out.