But let him that glorieth glory in this, that he understandeth and knoweth me, that I am the LORD which exercise lovingkindness, judgment, and righteousness, in the earth: for in these things I delight, saith the LORD.
Let him that glorieth glory in this ... knoweth me. Nothing but an experimental knowledge of God will save the nation.
Understandeth - theoretically; in the intellect.
Knoweth - practically; so as to walk in my ways (Jeremiah 22:16, "He judgeth the cause of the poor and needy; then it was well with him. Was not this to know me, saith the Lord;" Job 22:21, "Acquaint now thyself with Him, and be at peace;" 1 Corinthians 1:31, which is Paul's quotation of this verse, as inspired, "According as it is written, He that glorieth, let him glory in the Lord."
I am the Lord which exercise loving-kindness. God's mercy is put in the first and highest place, because without it we should flee from God in fear and despair.
Judgment and righteousness. Loving-kindness toward the godly; judgment toward the ungodly; righteousness the most perfect fairness in all cases (Grotius). Faithfulness to his promises to preserve the godly, as well as stern execution of judgment on the ungodly, is included in "righteousness."
In the earth - contrary to the dogma of some philosophers, that God does not interfere in terrestrial concerns (Psalms 58:11).
In these things I delight - as well in doing them as in seeing them done by others (Micah 6:8; Micah 7:18, "He retaineth not His anger forever, because He delighteth in mercy").