So, then, that being so, He being our light, just because He fits our needs, answers our desires, satisfies our cravings, fills the clefts of our hearts, and brings the response to all the questions of our understandings--that being the case, if the lamp is lit and blazing on the lampstand, and you and I have eyes to behold it, let us take heed that we cultivate the single eye which apprehends Christ. Concentration of purpose, simplicity and sincerity of aim, a heart centred upon Him, a mind drawn to contemplate unfalteringly and without distraction of crosslights His beauty, His supremacy, His completeness, and a soul utterly devoted to Him--these are the conditions to which that light will ever manifest itself, and illumine the whole man. But if we come with divided hearts, with distracted aims, giving Him fragments of ourselves, and seeking Him by spasms and at intervals, and having a dozen other deities in our Pantheon, beside the calm form of the Christ of Nazareth, what wonder is there that we see in Him 'no beauty that we should desire Him'? 'Unite my heart to fear Thy name.' Oh I if that were our prayer, and if the effort to secure its answer were honestly the effort of our lives, all His loveliness, His sweetness, His adaptation to our whole being, would manifest themselves to us. The eye must be 'single,' directed to Him, if the heart is to rejoice in His light. I need not do more than remind you of the blessed consequence which our Lord represents as flowing from this union of the seeing heart and the revealing light--viz., 'Thy whole body shall be full of light.' In every eye that beholds the flame of the lamp there is a little lamp-flame mirrored and manifested. And just as what we see makes its image on the seeing organ of the body, so the Christ beheld is a Christ embodied in us; and we, gazing upon Him, are 'changed into the same image from glory to glory, even as by the Lord the Spirit.' Light that remains without us does not illuminate; light that passes into us is the light by which we see, and the Christ beheld is the Christ ensphered in our hearts. III. So, lastly, this great saying gives us a lesson as to the duties of Christian men as lights in the world.