Charles H. Spurgeon on Psalms 73:2

He tells us that his feet were almost gone. The word signifies to bow, or bend under one. My steps had well nigh slipped, or poured out, kept not within their true bounds; but like water poured out and not confined, runs aside. Though these expressions be metaphorical, and seemingly dark and cloudy, yet they clearly represent unto us this truth, that his understanding was misguided, his judgment was corrupt, his affections disordered, turbulent, and guilty of too great a passion; and this, the consequence (Ps 73:22 in which he acknowledges himself ignorant, foolish, and brutish) do sufficiently evidence. Our understanding and judgment may well bear the comparison for feet, for as the one, in our motion, supports the body, so the other, in human actions and all employments, underprops the soul. The affections, also, are as paths and steps; as these of the feet, so these are the prints and expressions of the judgment and mind. Edward Parry, in "David Restored." 1660.