The Mercy Prayer

i want to know whether or not you lived with some one first who used to say it that. My mam nevers. Neither did my grandmother. And i wonder even if we started off this series of conversations talking about robert gelinus book, how lord have mercy is the most prayed prayer in the bible. Or when we run into the bigness of the world,. When we run into how small we are pared to the problems that we see in tehe wold. How do we respond to the mercies that we have received from god over and over again? What should be our reaction to this kind of god who has shown mercy to us in so many different ways