Psalms 74:12

For God is my King of old - We have always acknowledged thee as our sovereign; and thou hast reigned as a king in the midst of our land, dispensing salvation and deliverance from the center to every part of the circumference.

For God is my King of old - That is, the king, or ruler of his people. The people had acknowledged him as their king and ruler, and he had showed himself to be such. This is given as a reason why he should now interpose in their behalf. It is an argument, proper always to be urged, drawn from the faithfulness and unchangeableness of God.

Working salvation in the midst of the earth - Salvation for his people. The reference here particularly is to what he had done for his people in delivering them from bondage in Egypt, and conducting them to the promised land, as is stated in the following verses.

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