Paul’s Anthem to God’s Grace
Decrees is from the normal word for judgments (krimata), but here it seems it is best to translate the word differently. God is not judging His works; they are pronounced by Him and they form the tapestry of His many actions and plans in world history.
Incomprehensible is used only twice in the New Testament, both by Paul, here in Romans 11:33 and in Ephesians 3:8. The meaning is that God cannot be "traced out." One cannot follow His paths. We cannot figure Him out in His dealings with the nations and with Israel!
Ways is the Greek word hodos and means "paths, roads." What the Lord has shown us is what He has shown us! No more and no less! He is in charge and knows exactly what He is doing. We have to trust that He is all wise and is carrying out a perfect plan! Vine adds: "The verse emphases all His providential dispensations, His decisions, and decrees." (p. 412)