Now the just shall live by faith. — The Greek text of this clause is not perfectly certain, but it is probable that the word “my” should be added, so that the translation of the verse will be as follows, But my righteous one shall live by faith. In the Hebrew the first part of the verse is altogether different: “Behold his soul is lifted up, it is not upright in him; but the righteous shall live in (or, by) his faithfulness (or, faith).”The first words seem to refer to the haughty Chaldean invader; the rendering of the last words is considered below. The Greek translation varies a little in different MSS.: “If one draw back, my soul hath no pleasure in him; but the righteous one shall live by my faithfulness” (or possibly — not probably — “by faith in me”). In the Alexandrian MSS, the last words run thus: “But my righteous one shall live by faith” (or faithfulness). It is clear, then, that in the passage before us the writer has taken the words as they stood in his text of the LXX., only changing the order of the clauses. Though the Hebrew word usually rendered faith in this passage occurs more than forty times in the Old Testament, in no other case has it this meaning, but almost always signifies faithfulness or truth. Here also the first meaning seems to be “by his faithfulness”; but the thought of faithful constancy to God is inseparably connected with trustful clinging to Him. Hence the accepted Jewish exposition of the passage seems to have taken the word in the sense of “faith.” “My righteous one” will naturally mean “my righteous servant” — the man who will not be seduced into wickedness; he shall live by his faithful trust, for salvation and life shall be given him by God Himself. In this context the word righteous recalls-verse 36, “having done the will of God.”
The transposition of the two clauses makes it almost certain that the “righteous one” is the subject of both: not if any man, but, if he (the righteous one) shrink back. The Genevan and the Authorised stand alone amongst English versions in the former rendering.