In Mercy is God's Power Displayed
"But you have mercy on all
Because you can do all things"
It is interesting that an apocryphal book in the Catholic edition of the Bible understands (better than what is taught in Calvinism) the relation between God's omnipotence and His wrath -- there is none!
However, it is between God's omnipotence and mercy that we see a connection the text in the Wisdom of Solomon shows us: God seeks to reveal His mercy to sinful men precisely because he is all-powerful. God's display of mercy - His profound ability "to overlook the sins of men [in the hopes] that they repent" - expresses his omnipotence.
It was never God's intention to use wrath in order to display His glory and majesty, His attribute of omnipotence (Ezekiel 18:23,32; 2 Peter 3:9). Rather, through extending mercy to sinners is the awesome majesty of the divine power revealed.
Just consider the Cross.