The last beatitude breaks forth into a song of joy. No light-hearted joy, as of those who shut their eyes to the dark things in life, but joy in facing the very worst the world can do: "Blessed are ye when men shall revile you, and persecute you, and shall say all manner of evil against you falsely, for My sake. Rejoice, and be exceeding glad." O wonderful alchemy of heaven, which can change earth's dust and ashes into purest gold! Think, too, what riches and royalty of spirit in place of the poverty with which the series began. These eight beatitudes are the diatonic scale of heaven's music. Its key-note is blessing; its upper octave, joy. Those who heard it first with quickened souls could no longer doubt that the kingdom of heaven was at hand; indeed, was there on the mountain that day! 2. _In relation to the world_ (vv. 13-16). The original promise to Abraham was twofold: "I will bless thee," "Thou shalt be a blessing" (Gen. xii. 2). The beatitudes correspond to the former, the passage before us to the latter. The beatitudes are, so to speak, the home affairs of the kingdom of heaven; the passage which follows is occupied with foreign relations. Those spoke of blessedness within, this speaks of usefulness without; for the disciples of Christ are known not only by their personal character and disposition, but also by their influence on others. The relations of the members of the kingdom to "those that are without" is a complex and difficult subject; but the essence of it is set forth with surpassing clearness, comprehensiveness and simplicity by the use of two unpretentious but most expressive figures, almost infinite in their suggestiveness--salt and light. This is our first experience of a well-known characteristic of the teaching of Christ--viz., His use of the simplest and most familiar objects of nature and circumstances of daily life, to convey highest and most important truth; and at once we recognise the touch of the Master. We cannot fail to see that out of all nature's infinity He has selected the two illustrations,--the only two, which exactly fit and fill the purpose for which He employs them. To the thoughtful mind there is something here which prepares for such tokens of mastery over nature as are found later on in the hushing of the storm and the stilling of the sea. "Salt" suggests the conservative, "light" the liberal, side of the politics of the kingdom; but the two are not in opposition, they are in fullest harmony, the one being the complement of the other. Christian people, if they are what they profess to be, are all conservatives and all liberals: conservators of all that is good, and diffusers of all that is of the nature of light. Each of these sides of Christian influence is presented in succession.