As long as the spirit is imprisoned in the body and has it for its instrument there will be need for much effort at purifying. We must be content to overcome one foe at a time, and however strong may be the pilgrim's spirit in us, we must be content to take one step at a time, and to advance by very slow degrees. Nor is it to be forgotten that as we get nearer what we ought to be, we should be more conscious of the things in which we are not what we ought to be. The nearer we get to Jesus Christ, the more will our consciences be enlightened as to the particulars in which we are still distant from Him. A speck on a polished shield will show plain that would never have been seen on a rusty one. The saint who is nearest God will think more of his sins than the man who is furthest from him. So new work of purifying will open before us as we grow more pure, and this will last as long as life itself. II. The Christian life is to be not merely a continual getting rid of evil, but a continual becoming good. Paul here draws a distinction between cleansing ourselves from filthiness and perfecting holiness, and these two, though closely connected and capable of being regarded as being but the positive and negative sides of one process, are in reality different, though in practice the former is never achieved without the latter, nor the latter accomplished without the former. Holiness is more than purity; it is consecration. That is holy which is devoted to God, and a saint is one whose daily effort is to devote his whole self, in all his faculties and nature, thoughts, heart, and will, more and more, to God, and to receive into himself more and more of God. The purifying which Paul has been enjoining will only be successful in the measure of our consecration, and the consecration will only be genuine in the measure of our purifying. Herein lies the broad and blessed distinction between the world's morality and Christian ethics. The former fails just because it lacks the attitude towards a Person who is the very foundation of Christian morality, and changes a hard and impossible law into love. There is no more futile waste of breath than that of teachers of morality who have no message but Be good! Be good! and no motive by which to urge it but the pleasures of virtue and the disadvantages of vice, but when the vagueness of the abstract thought of goodness solidifies into a living Person and that Person makes his appeal first to our hearts and bids us love him, and then opens before us the unstained light of his own character and beseeches us to be like him, the repellent becomes attractive: the impossible becomes possible, and 'if ye love Me keep My commandments' becomes a constraining power and a victorious impulse in our lives. III. The Christian life of purifying and consecration is to be animated by hope and fear.