"_Ye are the salt of the earth._" The metaphor suggests the sad fact that, whatever tendency to upward development there may be in the world of nature, there is a contrary tendency in the world of men, so far as character is concerned. The world has often made great advances in civilisation; but these, unless counter-acted by forces from above, have always been accompanied by a degeneracy in morals, which in course of time has brought about the ruin of mighty states. All that is best and most hopeful in mere worldly civilisation has in it the canker of moral evil, "That rotting inward slowly moulders all." The only possible counteractive is the introduction of an element into society which will hold in check the forces that make for unrighteousness, and be itself an elevating and purifying influence. Such an element Christians were to be in the world. Such, to a large extent, they have been. That they were the salt of the Roman empire during the evil days of its decline, no student of history can fail to see. Again, in the "dark ages" that followed, we can still trace the sweetening influence of those holy lives which were scattered like shining grains of salt through the ferment and seething of the times. So it has been throughout, and is still. It is true that there is no longer the sharp distinction between Christians and the world which there was in days when it cost something to confess Christ. There are now so many Christians in name who are not so in reality, and, on the other hand, so many in reality who are not so in name, and moreover so many who are Christians neither in name nor in reality, but who are nevertheless unconsciously guided by Christian principles as the result of the wide diffusion of Christian thought and sentiment--that the conservative influence of distinctive Christianity is very difficult to estimate and is far less appreciated than it should be. But it is as real and efficient as ever. If Christianity, as a conservative force in society, were to be suddenly eliminated, the social fabric would fall in ruins; but if only the salt were all genuine, if Christian people everywhere had the savour of the eight beatitudes about them, their conservative power as to all that is good, and restraining influence as to all that is evil, would be so manifest and mighty that none could question it.