I can touch but very lightly on that solemn thought in which our Lord sets forth the condition of our faith, and therefore of our power. This kind goeth not out but by prayer and fasting. The discipline then which nurtures faith is mainly moral and spiritual--not as a substitute for, or to the exclusion of, the intellectual discipline, which is presupposed, not neglected, in these words. The first condition of the freshness and energy of faith is constant devotion. The attrition of the world wears it thin, the distractions of life draw it from its clinging hold on Christ, the very toil for Him is apt to entice our thoughts from out of the secret place of the most High into the busy arena of our strife. Therefore we have ever need to refresh the drooping flowers of the chaplet by bathing them in the Fountain of Life, to rise above all the fevered toil of earth to the calm heights where God dwells, and in still communion with Him to replenish our emptied vessels and fill our dimly burning lamps with His golden oil. The sister of the cumbered Martha is the contemplative Mary, who sits in silence at the Master's feet and lets His words sink into her soul; the closest friend of Peter the apostle of action is John the apostle of love. If our work is to be worthy, it must ever be freshened anew by our gaze into His face; if our communion with Him is to be deep, it must never be parted from outward service. Our Master has left us the example, in that, when the night fell and every man went to his own home, Jesus went to the Mount of Olives; and thence, after His night of prayer, came very early in the morning to the temple, and taught. The stream that is to flow broad and life-giving through many lands must have its hidden source high among the pure snows that cap the mount of God. The man that would work for God must live with God. It was from the height of transfiguration that _He_ came, before whom the demon that baffled the disciples quailed and slunk away like a whipped hound. This kind goeth not out but by prayer.