Charles H. Spurgeon on Psalms 79:9

"God of our salvation." If human reason were to judge of the many and great blows wherewith God so often smote and wasted his people, it would call God not the Saviour of the people, but the destroyer and oppressor. But the faith of the Prophet judges far otherwise of God, and sees even in an angry and pursuing God, the salvation of his people. The gods of the nations, though they do not afflict even in temporal things, are gods not of the salvation of their worshippers but of their perdition. But our God, even when he is most severely angry, and smites, is not the God of destruction, but of salvation.—Musculus.