"Be not conformed to this world." So obviously true are the remarks which have been made, that one reflection might well excite a momentary surprise. It might be said, "Is not unworldliness of the very essence of the new life? And if it be, why recommend that which must follow in the due course of things?" It is true that unworldliness _is_ of the essence of the new life; but we have to remember that we receive that life, not perfectly developed, but in its germ; and that the process of its growth is impeded by what remains of the old life which it is destined gradually, and by-and-by completely, to replace. This is the phenomenon which Paul describes when he speaks of the conflict between the "old" man and the "new." Our will is called upon at every point to decide between the impulses of our new condition and the habits of the old. In conclusion, how is this nonconformity to the world, in the spirit of a grateful consecration to God, to be attained? "Be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect will of God." This is the great desideratum--the great necessity. The primary change must take place in the mind--not in its nature, but in the kind and order of its _life_. It must be "renewed" in its bias, in its inclinations, in its aspirations, so that it may be able to understand and appreciate the Divine will, and to address itself to the order of service which the Father of mercies shall accept. It may be said, "What do we know of the spiritual world? And how can we be conformed to a world of which we know nothing?" The answer is, that our very Christianity supposes the change which sets this objection aside. Our love to this present world can only be subdued by its being superseded _by_ another, or subordinated _to_ another. Our love to Christ is the great secret of our attachment to heaven and to heavenly things. Given a soul under the influence of love to God, and loyalty to God must follow. In order to this, however, there must be self-knowledge. We must see our "differences." There must be the study of the character of Christ. There must also be earnest prayer for, and trust in, the help of the Holy Spirit. The work before us is more than an occasional outburst of religious sentiment; more than spasmodic, self-denying charity under the influence of suddenly awakened emotion; more than scrupulosity about small matters of pleasure or pursuit. _It is a life_; and as such it has spontaneity, freedom, and blessedness. In many an instance it attains wonderful maturity on earth; it is perfected in heaven.