God's Mercy - The reason we have for praising God is on account of His power and justice; however as great as those attributes are, it is the sweetness of His mercy that wins our hearts.
Mercy denotes the ready inclination of God to relieve our miseries.
The Holy Spirit calls upon all nations to celebrate the praises of God's mercy and faithfulness. "Praise Jehovah, all ye nations; magnify him, all ye peoples. Because his mercy is strengthened towards us: and the truth of Jehovah remains for ever. Praise ye Jehovah" (Psalm 117).
It is a different matter altogether that God is to be praised by us, His rational creatures. The reason is because God's mercy and truth furnish all we need for celebrating His praises.
First, God is to be praised because His goodness is increased, or strengthened. Secondly, because His truth remains steadfast forever.
His mercy is "great" (i Kings 3:6), "plenteous" (Psalm 86:5), "tender" (Luke 1:78), "abundant" (1 Peter 1:3); it is "from everlasting to everlasting upon them that fear Him" (Psalm 103:17). "His mercy endures forever" (Psalm 136:1).
God can never ease to be merciful, for this is a quality of His Divine essence (Psalm 116:5). And at the same time, the exercise of His mercy is regulated by His sovereign will. May we say with the Psalmist, "I will sing aloud of Thy mercy" (59:16).
The mercies of God upon the non-Christian are temporary. That is to say they are confined only to this present life. There will be no mercy extended to them beyond the grave. "It is a people of no understanding: therefore He that made them will not have mercy on them, and He that formed them will show them no favour: (Isaiah 27:11).
Do you have non-Christian family and friends? If so, pray that the Holy Spirit will convince them of their sin and misery, enlighten their minds in the knowledge of Christ and renew their wills, persuading and enabling them to embrace Jesus Christ, as He is freely offered to them in the gospel.