Much of our joy, of course, depends upon our fellows, and disappears when they fade away from our sight and we struggle along in a solitude, made the more dreary because of remembered companionship. And much of our joy depends upon the goodwill and help of our fellows, and they can snatch away all that so depends. They can hedge up our road and make it uncomfortable and sad for us in many ways, but no man but myself can put a roof over my head to shut me out from God and Christ; and as long as I have a clear sky overhead, it matters very little how high may be the walls that foes or hostile circumstances pile around me, and how close they may press upon me. And much of our joy necessarily depends upon and fluctuates with external circumstances of a hundred different kinds, as we all only too well know. But we do not need to have all our joy fed from these surface springs. We may dig deeper down if we like. If we are Christians, we have, like some beleaguered garrison in a fortress, a well in the courtyard that nobody can get at, and which never can run dry. 'Your joy no man taketh from you.' As long as we have Christ, we cannot be desolate. If He and I were alone in the universe, or, paradoxical as it may sound, if He and I were alone, and the universe were not, I should have all that I needed and my joy would be full, if I loved Him as I ought to do. So, my brother! let us see to it that we dig deep enough for the foundation of our blessedness, and that it is on Christ and nothing less infinite, less eternal, less unchangeable, that we repose for the inward blessedness which nothing outside of us can touch. That is the blessedness which we may all possess, 'For I am persuaded that neither death nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, nor height, nor depth, nor any other creature, shall be able to separate us' from the eye and the heart of the risen Christ who lives for us. But remember, though externals have no power to rob us of our joy, they have a very formidable power to interfere with the cultivation of that faith, which is the essential condition of our joy. They cannot force us away from Christ, but they may tempt us away. The sunshine did for the traveller in the old fable what the storm could not do; and the world may cause you to think so much about it that you forget your Master. Its joys may compel Him to hide His face, and may so fill your eyes that you do not care to look at His face; and so the sweet bond may be broken, and the consciousness of a living, loving Jesus may fade, and become filmy and unsubstantial, and occasional and interrupted. Do you see to it that what the world cannot do by violence and directly, it does not do by its harlot kisses and its false promises, tempting you away from the paths where alone you can meet your Master. IV. Lastly, note that this life of joy, which our Lord here speaks of, is made certain by the promise of a faithful Christ.