This inward life, in all its aspects, is to be sanctified through and through. All our powers of thought and imagination are to be consecrated; unholy thoughts are to be banished; lawless, roving imaginings, suppressed. All our inventiveness is to be used in God's service. All our affections are to be holy. Our heart's desire is not to settle on anything from which it would shrink in the day of the Lord Jesus. The fire which He came to cast on the earth must be kindled in our souls, and blaze there till it has burned up all that is unworthy of His love. Our consciences must be disciplined by His word and Spirit, till all the aberrations due to pride and passion and the law of the world have been reduced to nothing, and as face answers face in the glass, so our judgment and our will answer His. Paul prays for this when he says, May your whole soul be preserved blameless. But what is the special point of the sanctification of the spirit? It is probably narrowing it a little, but it points us in the right direction, if we say that it has regard to worship and devotion. The spirit of man is his life in its relation to God. Holiness belongs to the very idea of this; but who has not heard of sins in holy things? Which of us ever prays as he ought to pray? Which of us is not weak, distrustful, incoherent, divided in heart, wandering in desire, even when he approaches God? Which of us does not at times forget God altogether? Which of us has really worthy thoughts of God, worthy conceptions of His holiness and of His love, worthy reverence, a worthy trust? Is there not an element in our devotions even, in the life of our spirits at their best and highest, which is worldly and unhallowed, and for which we need the pardoning and sanctifying love of God? The more we reflect upon it, the more comprehensive will this prayer of the Apostle appear, and the more vast and far-reaching the work of sanctification. He seems himself to have felt, as man's complex nature passed before his mind, with all its elements, all its activities, all its bearings, all its possible and actual profanation, how great a task its complete purification and consecration to God must be. It is a task infinitely beyond man's power to accomplish. Unless he is prompted and supported from above, it is more than he can hope for, more than he can ask or think. When the Apostle adds to his prayer, as if to justify his boldness, "Faithful is He that calleth you, who will also do it," is it not a New Testament echo of David's cry, "Thou, O Lord of Hosts, the God of Israel, hast revealed to Thy servant, saying, I will build thee an house: therefore hath Thy servant found in his heart to pray this prayer unto Thee"?