I found this excerpt from a Sermon by Brian Bill. He concentrates on two words in this beatitude: blessed and mercy.
The principal Hebrew word for” mercy” speaks of an emotional response to the needs of others. It means to feel the pain of another so deeply that we’re compelled to do something about it. In fact, people in Bible times believed that the seat of emotions was found in the intestinal area. That’s why the King James Version uses the phrase, “bowels of mercy.” William Barclay defines mercy this way: “To get inside someone’s skin until we can see things with his eyes, think things with his mind, and feel things with his feelings; to move in and act on behalf of those who are hurting.” Mercy can be defined as: “good will toward the afflicted, joined with a desire to relieve them.”