These two verses are, in effect, the same, and both to the same purport with Pro 11:3. For the truths are here of such certainty and weight that they cannot be too often inculcated. Let us govern ourselves by these principles.
I. That the ways of religion are plain and safe, and in them we may enjoy a holy security. A living principle of honesty and grace will be, 1. Our best direction in the right way, in every doubtful case to say to us, This is the way, walk in it. He that acts without a guide looks right on and sees his way before him. 2. Our best deliverance from every false way: The righteousness of the upright shall be armour of proof to them, to deliver them from the allurements of the devil and the world, and from their menaces.
The ways of wickedness are dangerous and destructive: The wicked shall fail into misery and ruin by their own wickedness, and be taken in their own naughtiness as in a snare. O Israel! thou hast destroyed thyself. Their sin will be their punishment; that very thing by which they contrived to shelter themselves will make against them.

The righteousness of the perfect shall direct his way,.... Or "make it plain" (f); that is, the righteousness of those who are perfect in Christ, complete in him, perfectly justified by his righteousness; that righteousness makes their way plain; it is the direct way, the highway, the pathway to eternal life and happiness; see Pro 12:28;

but the wicked shall fall by his own wickedness; or, "in his wickedness" (g): in his own wicked way, which he has chosen and delights to walk in; he shall stumble therein, and fall into ruin and destruction, into hell and damnation: or by means or because of it he will fall; his wickedness will be the cause of his fall; as it will be the cause of the fall of Babylon, Rev 18:2.

(f) "rectam facit", Cocceius; "complanat viam ejus", Schultens. (g) "in impietate sua", Tigurine version, Montanus, Baynus, Michaelis; "improbitate sua", Junius & Tremellius, Piscator; "in injustitia sua", Cocceius; "in improbitate sua turbulenta", Schultens.

direct--or, "make plain"; wicked ways are not plain (Pro 13:17).