The steps of his strength shall be straitened, and his own counsel shall cast him down.
Steps of ... strength - Hebrew for his strong steps. A firm step marks health. To be straitened in steps is to be no longer able to move about at will (Proverbs 4:12; contrast Psalms 18:36, "Thou hast enlarged my steps under me").
His own counsel - or plans shall be the means of his fall (Job 5:13, "He taketh the wise in their own craftiness, and the counsel of the forward is carried headlong").