Psalms 119:142

Thy righteousness is an everlasting righteousness - The word צדק tsedek is a word of very extensive meaning in the Bible. It signifies, not only God's inherent righteousness and perfection of nature, but also his method of treating others; his plan of redemption; his method of saving others. And the word δικαιοσυνη, which answers to it, in the Septuagint and in the New Testament, is used with the same latitude of meaning, and in the same sense; particularly in that remarkable passage, Romans 3:25-26 (note), where see the notes. Thy merciful method of dealing with sinners and justifying the ungodly will last as long as the earth lasts; and thy law that witnesses this, in all its pages, is the truth.

Thy righteousness is an everlasting righteousness - It never changes. The principles of thy law, of thy government, and of thy method of saving people, are the same under all dispensations, in every land, in all worlds; and they will remain the same forever. Human governments change. Old dynasties pass away. New laws are enacted under new administrations. Customs change. Opinions change. People change. The world changes. But as God himself never changes, so it is with his law. That law is founded on eternal truth, and can never change.

And thy law is the truth - It is founded on "truth;" on the reality of things. It is so essentially founded on truth, it springs so certainly out of truth, or out of the reality of things, that it may be said to be the truth itself. He who understands the law of God understands what truth is, for it is the expression and the exponent of that which is true.

119:142 Everlasting - The same in all ages and places.