Islam was a movement; that is why it has ceased to move. For a movement can only be a mood. It may be a very necessary movement arising from a very noble mood, but sooner or later it must find its level in a larger philosophy, and be balanced against other things. Islam was a reaction towards simplicity; it was a violent simplification, which turned out to be an over-simplification. Stevenson has somewhere one of his perfectly picked phrases for an empty-minded man; that he has not one thought to rub against another while he waits for a train. The Moslem had one thought, and that a most vital one; the greatness of God which levels all men. But the Moslem had not one thought to rub against another, because he really had not another. It is the friction of two spiritual things, of tradition and invention, or of substance and symbol, from which the mind takes fire. The creeds condemned as complex have something like the secret of sex; they can breed thoughts.
An idealistic intellectual remarked recently that there were a great many things in the creed for which he had no use. He might just as well have said that there were a great many things in the Encyclopedia Britannica for which he had no use. It would probably have occurred to him that the work in question was meant for humanity and not for him. But even in the case of the Encyclopedia, it will often be found a stimulating exercise to read two articles on two widely different subjects and note where they touch. In fact there is really a great deal to be said for the man in Pickwick who read first about China and then about metaphysics and combined his information. But however this may be in the famous case of Chinese metaphysics, it is this which is chiefly lacking in Arabian metaphysics. They suffer, as I have said of the palm-tree in the desert, from a lack of the vitality that comes from complexity, and of the complexity that comes from comparison. They suffer from having been in a single movement in a single direction; from having begun as a mood and ended rather as a mode, that is a mere custom or fashion. But any modern Christian thus criticising the Moslem movement will do well to criticise himself and his world at the same time. For in truth most modern things are mere movements in the same sense as the Moslem movement. They are at best fashions, in which one thing is exaggerated because it has been neglected. They are at worst mere monomanias, in which everything is neglected that one thing may be exaggerated. Good or bad, they are alike movements which in their nature can only move for a certain distance and then stop. Feminism, for instance, is in its nature a movement, and one that must stop somewhere. But the Suffragettes no more established a philosophy of the sexes by their feminism than the Arabs did by their anti-feminism. A woman can find her home on the hustings even less than in the harem; but such movements do not really attempt to find a final home for anybody or anything. Bolshevism is a movement; and in my opinion a very natural and just movement considered as a revolt against the crude cruelty of Capitalism. But when we find the Bolshevists making a rule that the drama "must encourage the proletarian spirit," it is obvious that those who say so are not only maniacs but, what is more to the point here, are monomaniacs. Imagine having to apply that principle, let us say, to "Charley's Aunt." None of these things seek to establish a complete philosophy such as Aquinas founded on Aristotle. The only two modern men who attempted it were Comte and Herbert Spencer. Spencer, I think, was too small a man to do it at all; and Comte was a great enough man to show how difficult it is to do it in modern times. None of these movements can do anything but move; they have not discovered where to rest.
And this fact brings us back to the man of the desert, who moves and does not rest; but who has many superiorities to the restless races of the industrial city. Men who have been in the Manchester movement in 1860 and the Fabian movement in 1880 cannot sneer at a religious mood that lasted for eight hundred years. And those who tolerate the degraded homelessness of the slums cannot despise the much more dignified homelessness of the desert. Nevertheless, the thing is a homelessness and not a home; and there runs through it all the note of the nomad. The Moslem takes literally, as he takes everything, the truth that here we have no abiding city. He can see no meaning in the mysticism of materialism, the sacramental idea that a French poet expressed so nobly, when he said that our earthly city is the body of the city of God. He has no true notion of building a house, or in our Western sense of recognising the kindred points of heaven and home. Even the exception to this rule is an exception at once terrible and touching. There is one house that the Moslem does build like a house and even a home, often with walls and roof and door; as square as a cottage, as solid as a fort. And that is his grave. A Moslem cemetery is literally like a little village. It is a village, as the saying goes, that one would not care to walk through at night. There is something singularly creepy about so strange a street of houses, each with a door that might be opened by a dead man. But in a less fanciful sense, there is about it something profoundly pathetic and human. Here indeed is the sailor home from sea, in the only port he will consent to call his home; here at last the nomad confesses the common need of men. But even about this there broods the presence of the desert and its dry bones of reason. He will accept nothing between a tent and a tomb.
The philosophy of the desert can only begin over again. It cannot grow; it cannot have what Protestants call progress and Catholics call development. There is death and hell in the desert when it does begin over again. There is always the possibility that a new prophet will rediscover the old truth; will find again written on the red sands the secret of the obvious. But it will always be the same secret, for which thousands of these simple and serious and splendidly valiant men will die. The highest message of Mahomet is a piece of divine tautology. The very cry that God is God is a repetition of words, like the repetitions of wide sands and rolling skies. The very phrase is like an everlasting echo, that can never cease to say the same sacred word; and when I saw afterwards the mightiest and most magnificent of all the mosques of that land, I found that its inscriptions had the same character of a deliberate and defiant sameness. The ancient Arabic alphabet and script is itself at once so elegant and so exact that it can be used as a fixed ornament, like the egg and dart pattern or the Greek key. It is as if we could make a heraldry of handwriting, or cover a wall-paper with signatures. But the literary style is as recurrent as the decorative style; perhaps that is why it can be used as a decorative style. Phrases are repeated again and again like ornamental stars or flowers. Many modern people, for example, imagine that the Athanasian Creed is full of vain repetitions; but that is because people are too lazy to listen to it, or not lucid enough to understand it. The same terms are used throughout, as they are in a proposition of Euclid. But the steps are all as differentiated and progressive as in a proposition of Euclid. But in the inscriptions of the Mosque whole sentences seem to occur, not like the steps of an argument, but rather like the chorus of a song. This is the impression everywhere produced by this spirit of the sandy wastes; this is the voice of the desert, though the muezzin cries from the high turrets of the city. Indeed one is driven to repeating oneself about the repetition, so overpowering is the impression of the tall horizons of those tremendous plains, brooding upon the soul with all the solemn weight of the self-evident.
There is indeed another aspect of the desert, yet more ancient and momentous, of which I may speak; but here I only deal with its effect on this great religion of simplicity. For it is through the atmosphere of that religion that a man makes his way, as so many pilgrims have done, to the goal of this pilgrimage. Also this particular aspect remained the more sharply