v1-2: No escape for the priests, as in 1.6-8; God is not deceived, He does see; His words here are firm, as He shakes them, urging them to mend their ways.
They have already suffered curses from God, Hag 1.5-6, and there is more to come. They must take to heart the warnings, applying the Lord's words to their own hearts.
v3-4: The clear reason why judgment must come; here is God purifying and cleansing His people. The specific reason is that His covenant with Levi be maintained.
v5-6: The responsibility of the priests is based on God's covenant with them, and this covenant is to be maintained.
Levi was God's gift to Israel, that Israel might fear Him. The covenant was of "life and peace," which is the blessing for the spiritually minded, Rom 8.6.
Verse 6 also points us to Christ, who is perfectly righteous;
He spoke perfect truth, never injustice;
He walked in peace and equity;
He turned many from iniquity.
In these things, therefore, He is our example, and especially so for leaders, Josh 1.8; Dan 12.3.
v7: The priest, the messenger of the Lord of hosts, an ambassador for Christ. The people must have a confidence that he will always bring truth.
v8-9: Their grievous failure;
they departed from the way;
they caused many to stumble, bringing a poor influence upon others;
they corrupted the covenant;
they did not keep God's ways, neglecting to obey what God had said;
they showed partiality.
The same standards are expected in Christian leaders, Matt 28.20; Acts 20.27; 1 Tim 4.11,13,16. Where the priests failed to honour God's standards, they are despised and humiliated. Although the people were restored to Jerusalem, and had put away their idolatry, they began to slip into bad habits of ritualism and complacency.
v10: We claim to know God as our Father, but that claim is denied by treachery and deceit. Judah and Israel have the calling to be the testimony to God in the world, but they failed to honour that.
v11: Double standards; a covenant with a foreign god; their love for God is not true.
v12: Those who are guilty will be judged.
v13: The apparent devotion of the people, with lots of emotion; they are surprised that the Lord does not answer their prayers.
v14: The problem; "broken faith," as in v10-11; Judah has behaved with treachery. He is responsible before God, his witness, and cannot avoid the blame. The message is clear about "the wife of your marriage covenant," and it is wrong to break that covenant.
v15: The unity of the covenant is from God, and the unfaithful people have broken that covenant. The covenant is provided since the Lord seeks "godly offspring." This purpose is therefore frustrated by the people's unfaithfulness.
v16: Divorce, separation, treachery; all hated by the Lord God. But we can "guard" ourselves, and thus avoid breaking faith.
v17: Man's own deceit and unfaithfulness distorts his view of God; he thus imputes to God either injustice or complacency. Man has "wearied" God because these bad attitudes remained.