# riches of his grace

Paul speaks of God's grace as if it were material wealth. AT: "greatness of God's grace" or "abundance of God's grace" (See: [[rc://en/ta/man/translate/figs-metaphor]])

# He lavished this grace upon us

"He gave us this great amount of grace" or "He was extremely kind to us"

# with all wisdom and understanding

Possible meanings are 1) "because he has all wisdom and understanding" 2) "so that we might have great wisdom and understanding"