Charles H. Spurgeon on Psalms 119:37

Turn away mine eyes from beholding vanity. An ugly object loses much of its deformity when we look often upon it. Sin follows the general law, and is to be avoided altogether, even in its contemplation, we would be safe. A man should be thankful in this world that he eyelids; and as he can close his eyes, so he should often do it. Albert Barnes.