Jamieson, Fausset & Brown

If any man will do his will, &c.--"is willing," or "wishes to do." whether . . . of God, or . . . of myself--from above or from beneath; is divine or an imposture of Mine. A principle of immense importance, showing, on the one hand, that singleness of desire to please God is the grand inlet to light on all questions vitally affecting one's eternal interests, and on the other, that the want of his, whether perceived or not, is the chief cause of infidelity amidst the light of revealed religion.