I said in my first lecture that the whole story of Roman religious experience falls into two parts: first, that of the formularisation of rules and methods for getting effectively into right relations with the Power manifesting itself in the universe; secondly, that of the gradual discovery of the inadequacy of these, and of the engrafting on the State religion of Rome of an ever-increasing number of foreign rites and deities. The first of these stories has been occupying us so far, and before I leave it for what will be practically an introduction to succeeding lectures, it will be as well for me to sum up the results at which we have already arrived. I began with what I called the protoplasm of religion, the primitive ideas and practices which form the psychological basis of the whole growth. The feeling of awe and anxiety about that which is mysterious and unknown, the feeling which the Romans called _religio_, seems to have manifested itself in Italy, as elsewhere, in those various ways which I discussed in my second and third lectures, in the various forms of magic, negative and positive. We find unmistakable evidence of the existence of those strict rules of conduct called taboos, which fetter the mind and body of primitive man, which probably arise from an ineffective desire to put himself in right relations with forces he does not understand, and which have their value as a social discipline. Again, we find surviving in historical Rome numerous forms of active or positive magic, by which it was thought possible to compel or overcome those powers, so as to use them for your own benefit and against your enemies. But I was careful to point out that on the whole little of all this evidence of the early existence of magic at Rome is to be found in the public religion of the Roman State, and that the natural inference from this is that at one time or another there must have been a very powerful influence at work in cutting away these obsolete root-leaves of the plant that was to be, and in making of that plant a neat, well-defined growth.