v1-2: Many of the people of Israel had married with Gentiles; the leaders had set a bad example; Deut 7.1-4; Mal 2.10-12. God's people had been called apart to be holy for Him (Lev 20.7).
v3-4: Ezra was sensitive to sins; he sat down appalled. He was ashamed and humiliated (Ps 143.4). He shared sorrow for sins even though he was not personally guilty (Dan 9.5). This points us to Jesus Christ, who knew no sin, but became sin for us.
Ezra and the people trembled at God's word (Is 66.5), and this led to action and obedience. Although many joined Ezra, there was perhaps the disappointment that so many were guilty, since those who had returned to Jerusalem were considered the more faithful and committed Jews.
v5-6: In prayer, Ezra identified with the people and their sins. The sin of mixed marriages had begun before they had ever entered the promised land (Num 25.1), and recurred later (Neh 13.23). The Bible repeatedly warns of sins to be avoided.
Ezra's actions and words indicate a deep sorrow; self-abasement, tunic and cloak torn, on his knees; he was "too ashamed" to lift up his face to heaven, the people's sins and guilt were serious.
v7: The nation had long been guilty, and had suffered punishment from God. The implication here is that further punishment must be expected.
v8-9: God's grace never ended, Is 54.7-8; He brought the people back from exile, opened the door of opportunity to rebuild the temple. “He has shown us kindness … He has granted us new life…” words echoed later in Ephesians. Such indeed is the grace of God towards the undeserving.
v10: In spite of God's grace, the people fell into sins; What shall we see after this?" "Shall we again break your commands?" (v14). How often God's people abuse His grace by disobedience, and by careless living! The folly of deliberate sins!
v11-12: See Lev 18.24-26; Deut 7.1-3; the land had been filled with impurity, from its previous inhabitants. The people of Israel had to respond in holiness and separation.
For the Christian in a dark and sinful world, there is a constant need to keep close to the Lord; we must be aware that sin in real, and avoid condoning it in our own lives. In particular, close relationships with unbelievers can bring us to temptation and sins.
v13-15: The Lord God is righteous; and we come to Him with no righteousness of our own. Ezra admitted that God had been merciful in His treatment of His people; He had restored them to the promised land. But they had once more turned to disobedience.