4. God, who is rich—Greek "(as) being rich in mercy."
for—that is, "because of His great love." This was the special ground of God's saving us; as "rich in mercy" (compare Eph 2:7; Eph 1:7; Ro 2:4; 10:12) was the general ground. "Mercy takes away misery; love confers salvation" [Bengel].