I really like Eastern articulation (from Simeon the New Theologian) Grace = uncreated energy of God It inspired the essence/energy distinction; that grace is the conscious, experiential presence of the uncreated Holy Spirit. And it builds on the Augustinian idea of grace as the indwelling Holy Spirit. If you’re experiencing grace, it is divine, and you’re experiencing the Holy Spirit personally, that is, person to (divine) person. And since we are not divine, this is as unmerited as it gets. The western formulation is usually something like “divine aid” but in usual discourse often lacks the very real personal connection of the Holy Spirit (though you’ll find it in some western theologians).