Thy righteousness - Thy justice; that is, the justice of God considered as residing in his own nature; his justice in his laws; his justice in his providential dealings; his justice in his plan of delivering man from sin; his justice to the universe in administering the rewards and penalties of the law.
Is like the great mountains - Margin, as in Hebrew: “the mountains of God.” The name “God” is thus, in the Scriptures, often given to that which is great or exalted, as God is the greatest Being that the mind can form any conception of. So in Psalms 80:10 : “The boughs thereof were like the goodly cedars,” in the Hebrew, “cedars of God.” Connecting his name with “mountains” or “cedars,” we have the idea of “strength” or “greatness,” as being especially the work of the Almighty. The idea here is, that as the mountains are the most stable of all the objects with which we are acquainted, so it is with the justice of God. It is as fixed as the everlasting hills.
Thy judgments - The acts and records which are expressive of thy judgment in regard to what is right and best; that judgment as it is expressed in thy law, and in thy dealings with mankind. The “judgment” of God in any matter may be expressed either by a declaration or by his acts. The latter is the idea now most commonly attached to the word, and it has come to be used almost exclusively to denote “afflictive” dispensations of His Providence, or expressions of His displeasure against sin. The word is not used in that exclusive sense in the Scriptures. It refers to any divine adjudication as to what is right, whether expressed by declaration or by act, and would include his adjudications in favor of that which is right as well as those against that which is wrong.
Are a great deep - The word rendered “deep” here means properly wave, billow, surge; then, a mass of waters, a flood, a deep; and the phrase “great deep” would properly refer to the ocean, its “depth” being one of the most remarkable things in regard to it. The “idea” here is, that as we cannot fathom the ocean or penetrate to its bottom, so it is with the judgments of God. They are beyond our comprehension, and after all our efforts to understand them, we are constrained, as in measuring the depths of the ocean, to confess that we cannot reach to the bottom of them. This is true in regard to his law, in regard to the principles of his government as he has declared them, and in regard to his actual dealings with mankind. It could not be otherwise than that in the administration of an infinite God there must be much that man, in his present state, could not comprehend. Compare Job 11:7-9; Isaiah 55:8-9.
O Lord, “thou preservest man and beast - literally, thou wilt “save;” that is, thou savest them from destruction. The idea is, that he keeps them alive; or that life, where it is continued, is always continued by his agency. The psalmist evidently sees in the fact here stated an illustration of what he had just said about the “greatness” of God in His providential agency and his general government. He was struck with His greatness, and with the incomprehensible nature of His power and agency, in the fact that he kept alive continually so many myriads of creatures upon the earth - so many hundred millions of human beings - so many thousand millions of wild beasts, reptiles, fish, birds, and insects - all dependent upon Him; that He provided for their needs, and that He protected them in the dangers to which they were exposed. And who can comprehend the extent of His law, and the wonderfulness of His Providence, in thus watching over and providing for the multitudes of animated beings that swarm in the waters, in the air, and on the earth?