Hebrews 12:13

13.And make straight paths, etc. He has been hitherto teaching us to lean on God’s consolations, so that we may be bold and strenuous in doing what is right, as his help is our only support; he now adds to this another thing, even that we ought to walk prudently and to keep to a straight course; for indiscreet ardor is no less an evil than inactivity and softness. At the same time this straightness of the way which he recommends, is preserved when a man’s mind is superior to every fear, and regards only what God approves; for fear is ever very ingenious in finding out byways. As then we seek circuitous courses, when entangled by sinful fear; so on the other hand every one who has prepared himself to endure evils, goes on in a straight way wheresoever the Lord calls him, and turns not either to the right hand or to the left. In short, he prescribes to us this rule for our conduct, — that we are to guide our steps according to God’s will, so that neither fear nor the allurements of the world, nor any other things, may draw us away from it. (253)

Hence be adds, Lest that which is lame be turned out of the way, or, lest halting should go astray; that is, lest by halting ye should at length depart far from the way. He calls it halting, when men’s minds fluctuate, and they devote not themselves sincerely to God. So spoke Elijah to the double­minded who blended their own superstitions with God’s worship, “How long halt ye between two opinions?” (1 Kings 18:21.) And it is a befitting way of speaking, for it is a worse thing to go astray than to halt. Nor they who begin to halt do not immediately turn from the right way, but by degrees depart from it more and more, until having been led into a diverse path so they remain entangled in the midst of Satan’s labyrinth. Hence the apostle warns us to strive for the removal of this halting in due time; for if we give way to it, it will at length turn us far away from God.

The words may indeed be rendered, “Lest halting should grow worse,” or turn aside; but the meaning would remain the same; for what the Apostle intimates is, that those who keep not a straight course, but gradually though carelessly turn here and there, become eventually wholly alienated from God. (254)