For the Lord is a great God - For Yahweh is a great God. The object is to exalt Jehovah, the true God, as distinguished from all who were worshipped as gods. The first idea is that he is “great;” that he is exalted over all the universe; that he rules over all, and that he is to be worshipped as such.
And a great King above all gods - This does not mean that he is a great ruler of all other gods, as if they had a real existence, but that he is king or ruler far above all that were worshipped as gods, or to whom homage was paid. Whoever, or whatever was worshipped as God, Yahweh was supreme over all things. He occupied the throne; and all others must be beneath him, and under his dominion. If the sun, the moon, or the stars were worshipped - if the mountains or the rivers - if angels good or bad - yet Yahweh was above all these. If imaginary beings were worshipped, yet Yahweh in his perfections was exalted far above all that was ascribed to them, for He was the true God, and the Ruler of the universe, while they were beings of the imagination only.