A comment I often find myself making when I work with a passage or diea for a sermon.
Today I've been working with Luke 15 and 16 ahead of Sunday's service, and, having been reminded of Luke's theme of the ptokoj (the poor), have been trying to read the parables in that light. As I neared the last sentence of my draft sermon, I recalled the verse "the poor will always be with you" and tried to recall where it came from. Three of the gospels have it; Luke is not one of them. Hmmm.
OK, so everyone else already knew that, but I hadn't spotted it until now.