4. _Reasonableness._ The true consecration is not the result of any mere positive or arbitrary enactment, the ground and propriety of which cannot be discerned. The true Christian does not spend his life upon a certain principle, and consequently in a certain way, merely because he is _told_ to do so. The service which he renders to God rises out of his felt _relations_ to God. If it were not commanded at all--if it were not even formally hinted at as an obligation--it would still be natural, "reasonable," and therefore right. The realised "mercies of God" would be instinctively understood to claim it--instinctively felt to prompt it. "Your reasonable service." The words are significant. "Service" is properly _homage_. "Reasonable" is that which pertains to the _mind_. So that the apostle's phrase stands opposed to all mere religious externalism. It is the homage of the life to God with the full consent of the mind, in the consciousness of the sacred obligation arising out of the enjoyment of the Divine mercy in the salvation of the soul. Such service is declared to be "acceptable to God." It is so for the sake of Christ whose grace has infused into the soul the life out of which it springs; it is so because the motives which determine it are right and good; and it is so because it is the loving gift of His own children. But the apostle expands his thought, so as to set forth this consecration under other aspects--as, for example, that of _nonconformity to the world_. "Be not conformed to this world." A word of explanation is required on the meaning of the term, "this world." It is obvious that this term has no reference to the external frame of things, considered in itself. In a loose way we apply the term "world" to many things, and Nature is one of them. But full compliance with the apostle's admonition in the text is compatible with even an enthusiastic admiration of Nature. Nature is a mirror in which we may see the wisdom and the goodness of God. It is full of the beautiful to be loved--full of the sublime to be admired. Its phenomena, forms, and laws, are worthy of the most reverential and pleasurable investigation, not only for what they are in themselves, but because the most spiritual Christian can say, "My Father made them all: they are His." The term "world," again, sometimes means the aggregate of human beings; but nonconformity to the world is at the furthest remove from misanthropy. Human beings are proper objects of a Christian's love, and his love for them is shown in the best efforts he can make for their welfare. Every man is, to his mind, invested with a sacred importance. He endeavours to estimate men as fully as possible in the same way as God does, of whom it is said that "His mercies are over all His works," and that "He so loved the world, that He gave His only begotten Son, that whosoever believeth in Him should not perish, but have everlasting life." At the lowest, man is God's