LORD HAVE MERCY!
The cry, "Lord have mercy, Lord have mercy, Lord have mercy", is continually repeated in the One, Holy, Catholic, and Apostolic Church throughout the world, being used more than any other phrase, and is repeated in all prayers and services. One of the reasons for this repetition is that it arouses the disposition in our souls to be merciful to others, for we cannot ask for mercy without offering it. In asking God for His mercy, we learn to bestow mercy on others, in accordance with the Beatitude: "Blessed are the merciful for they shall obtain mercy." The other reason is asking God for mercy, places us under His Son who alone brought His great mercy into the world, making it available to all.
Why do we ask God for mercy and what is the mercy that we seek, it is very important to know where we stand, how can we aware that we have received His great mercy?