| Geneva Study Bible But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness! People's New Testament 6:22,23 The light of the body is the eye. This is not an abrupt transition, but bears on the same subject. If one's eye is diseased, all he sees is wrong. So the mind, or conscience, is the light of the soul. If these be darkened, all is darkness; if these see aright, all is light. Jamieson-Fausset-Brown Bible Commentary 23. But if thine eye be evil-distempered, or, as we should say, If we have got a bad eye. thy whole body shall be full of darkness-darkened. As a vitiated eye, or an eye that looks not straight and full at its object, sees nothing as it is, so a mind and heart divided between heaven and earth is all dark. If therefore the light that is in thee be darkness, how great is that darkness!-As the conscience is the regulative faculty, and a man's inward purpose, scope, aim in life, determines his character-if these be not simple and heavenward, but distorted and double, what must all the other faculties and principles of our nature be which take their direction and character from these, and what must the whole man and the whole life be but a mass of darkness? In Luke (Lu 11:36) the converse of this statement very strikingly expresses what pure, beautiful, broad perceptions the clarity of the inward eye imparts: "If thy whole body therefore be full of light, having no part dark, the whole shall be full of light, as when the bright shining of a candle doth give thee light." But now for the application of this. Matthew Henry's Concise Commentary 6:19-24 Worldly-mindedness is a common and fatal symptom of hypocrisy, for by no sin can Satan have a surer and faster hold of the soul, under the cloak of a profession of religion. Something the soul will have, which it looks upon as the best thing; in which it has pleasure and confidence above other things. Christ counsels to make our best things the joys and glories of the other world, those things not seen which are eternal, and to place our happiness in them. There are treasures in heaven. It is our wisdom to give all diligence to make our title to eternal life sure through Jesus Christ, and to look on all things here below, as not worthy to be compared with it, and to be content with nothing short of it. It is happiness above and beyond the changes and chances of time, an inheritance incorruptible. The worldly man is wrong in his first principle; therefore all his reasonings and actions therefrom must be wrong. It is equally to be applied to false religion; that which is deemed light is thick darkness. This is an awful, but a common case; we should therefore carefully examine our leading principles by the word of God, with earnest prayer for the teaching of his Spirit. A man may do some service to two masters, but he can devote himself to the service of no more than one. God requires the whole heart, and will not share it with the world. When two masters oppose each other, no man can serve both. He who holds to the world and loves it, must despise God; he who loves God, must give up the friendship of the world. | 
