Charles H. Spurgeon on Psalms 119:37

Turn away mine eyes from beholding vanity. That sin may be avoided we must avoid whatsoever leads to or occasions it. As this caused Job (Job 31:1) to covenant strongly with his eyes, so it caused David to pray earnestly about his eyes. "Turn away mine eyes (or as the Hebrew may be rendered, make them to pass), from beholding vanity." The eye is apt to make a stand, or fix itself, when we come in view of an ensnaring object; therefore it is our duty to hasten it away, or to pray that God would make it pass off from it... He that feareth burning must take heed of playing with fire: he that feareth drowning must keep out of deep waters. He that feareth the plague must not go into an infected house. Would they avoid sin who present themselves to the opportunities of it? Joseph Caryl.