God's mercy is active; the Spirit He sent to us is alive and working every day in the church. It should be working actively inside each of us. It can be a beautiful, flawless game of telephone (aka whisper-down-the-lane), where we receive God's mercy then pass it along, through our own lives and acts of mercy, to others.
On the Catholic Spiritual Direction blog, a few days ago, I found a very fitting quote from Father Jean-Pierre de Caussade. In his book The Joy of Full Surrender, we read this:
We may know all the theories and understand the explanations of this work in the soul, speak and write about them beautifully, or instruct and direct others; but if this knowledge is only head-knowledge, the professor of it will be like a sick physician compared to simple people who enjoy perfect health, who live and act according to God’s designs and are guided by His holy will, even though they are ignorant of theories.To put it another way, talking and reading about God by itself is like trying to scratch an itch by thinking about sandpaper. At some point, you have to stop learning and thinking and discussion, and start doing.