For God is my King of old, working salvation {h} in the midst of the earth.

(h) Meaning in the sight of all the world.

Wesley's Notes

74:12 King - It belongs therefore to thy office to protect and save me. Midst - In the view of the world.

Jamieson-Fausset-Brown Bible Commentary

12. For-literally, "And," in an adversative sense.

Matthew Henry's Concise Commentary

74:12-17 The church silences her own complaints. What God had done for his people, as their King of old, encouraged them to depend on him. It was the Lord's doing, none besides could do it. This providence was food to faith and hope, to support and encourage in difficulties. The God of Israel is the God of nature. He that is faithful to his covenant about the day and the night, will never cast off those whom he has chosen. We have as much reason to expect affliction, as to expect night and winter. But we have no more reason to despair of the return of comfort, than to despair of day and summer. And in the world above we shall have no more changes.