Matthew Henry Commentary Psalms 50:1-6

"The Mighty One, God, Jehovah, hath spoken, And called the earth from the rising of the sun unto the going down thereof. Out of Zion, the perfection of beauty, God hath shined forth. Our God cometh, and doth not keep silence: A fire devoureth before him, And it is very tempestuous round about him. He calleth to the heavens above, And to the earth, that he may judge his people: Gather my saints together unto me, Those that have made a covenant with me by sacrifice. And the heavens shall declare his righteousness; For God is judge himself. Selah" — Psalms 50:1-6 (ASV)

This psalm is a psalm of instruction. It tells of the coming of Christ and the day of judgment, in which God will call people to account; and the Holy Ghost is the Spirit of judgment. It concerns all humankind to know the right way of worshipping the Lord, in spirit and in truth.

In the great day, our God will come, and make those who would not listen to his law hear his judgment. Happy are those who come into the covenant of grace, by faith in the Redeemer's atoning sacrifice, and show the sincerity of their love by fruits of righteousness. When God rejects the services of those who rest in external observances, he will graciously accept those who seek him rightly.

It is only by sacrifice, by Christ, the great Sacrifice, from whom the sacrifices of the law derived their value, that we can be accepted by God. True and righteous are his judgments; even sinners' own consciences will be forced to acknowledge the righteousness of God.