Amos 5:24 - Albert Barnes' Notes on the Bible

But - (And) let judgment run down (Literally, “roll” English margin) “like water.” The duties of either table include both; since there is no true love for man without the love of God, nor any real love or duty to God without the love of man. People will exchange their sins for other sins. They will not break them off unless they be converted to God. But the first outward step in conversion, is to break off sin. He bids them then “let judgment,” which had hitherto ever been perverted in its course, “roll on like” a mighty tide of “waters,” sweeping before it all hindrances, obstructed by no power, turned aside by no bribery, but pouring on in one perpetual flow, reaching all, refreshing all, and “righteousness like a mighty (or ceaseless) stream.” The word “ethan” may signify “strong or perennial.” Whence the seventh month, just before the early rain, was called “the month Ethanim 1 Kings 8:2, that is, the month of the “perennial streams,” when they alone flowed. In the meaning “perennial,” it would stand tacitly contrasted with “streams which fail or lie.” True righteousness is not fitful, like an intermitting stream, vehement at one time, then disappearing, but continuous, unfailing.