Musar על רות 2:13

We find that people who practice humility deserve to become the founders of great dynasties. Ruth, the maternal great-grandmother of David, who was herself the daughter of a king, could have demanded to be treated as a princess. Instead she went to glean among the ears of grain with the poor of Bet Lechem. David, mighty king of Israel and prototype of the Messiah said of himself "I am a worm."