I have been compelled to warn you against the romantic superstition that the Middle Ages were specifically religious, and yet it is quite true that the first aspect of mediaeval life which compels our attention is exactly the development of the sense of the significance of the spiritual quality of life. This was the first great task of the men of the Middle Ages, and this was in a real sense their achievement; but not as contradicting the characteristic developments of the Hellenic civilization, but rather as completing and fulfilling it. It is indeed a singular superstition that the Hellenic world was lacking in spiritual insight, but I need only refer you to Miss Stawell's lecture, as serving to show you how great and how real this was. It really was not a mistake when an honest but rather stupid man like Justin Martyr, and the more acute and penetrating minds of the Alexandrian Fathers like Clement and Origen, thought that they heard the authentic accents of the 'Word' of God in the great philosophers of Greece, and especially in Plato.
The apprehension of the spiritual element in human experience was not wanting in Hellenic civilization, but it needed a further development and especially in relation to those new apprehensions of personality and individuality, whose appearance we can trace both in the post-Aristotelian philosophy, and in the later Hebrew prophets and poets, which Christianity found in the world, and to which in its conception of the human in the Divine, and the Divine in the human, it gave a new force and breath. It is easy for us to smile at what may well be the over-rhetorical phrases of Seneca when he speaks of the self-sufficingness (αυταρκεια) of the wise man, or when he says that the wise man is, but for his mortality, like God himself; and yet these rhetorical phrases are, after all, the forms of an apprehension which has changed and is changing the world. And, it must be remembered that to understand the full significance of these phrases, we must bear in mind that the men of the Graeco-Roman civilization had put aside once and for all the 'natural' distinction between the 'Greek' and the 'Barbarian', had recognized that men were equal and alike, not different and unequal, that all men were possessed of reason, and all were capable of virtue,[23] or, in the Christian terms, all men are the children of God and capable of communion with Him.
It is this new apprehension of life for which the Middle Ages found a new form in the great organization of the Church, and it is this which justifies our sense of the great and permanent significance of the tremendous conflict of the Papacy and the Empire. It is true that at times some of the representatives of the Church seem to have fallen into the mistake of aiming at a tyranny of the Church over the State, which would have been in the end as disastrous to the Church itself as to the State. But the normal principle of the Church was that which was first fully stated by Pope Gelasius I in the fifth century, that the two great authorities, the spiritual and the temporal, are each divine, each draws its authority ultimately from God himself, each is supreme and independent in its own sphere, while each recognizes the authority of the other within its proper sphere.
It is, indeed, the freedom of the spiritual life which the mediaeval Church was endeavouring to defend; it was the apprehension that there was some ultimate quality in human nature which stands and must stand outside of the direct or coercive control of society, which lies behind all the confused clamour of the conflicts of Church and State.
It is true that in this great and generous effort to secure the freedom of the human soul men in some measure lost their way. They demanded and in a measure they succeeded in asserting the freedom of the religious organization, as against the temporal organization, but in doing this they went perilously near to denying the freedom of the individual spiritual experience. They went perilously near to denying it, but they never wholly forgot it. The Church claimed and exercised an immense authority in religion, so immense an authority that it might easily seem as though there were no place left for the freedom of the individual judgement and conscience. And yet that was not the case. The theory of excommunication that is set out in the canonical literature of the Middle Ages has generally been carelessly studied and imperfectly understood. It was the greatest and most masterful of the Popes, Innocent III, who laid down in memorable phrases which are embodied in the great collection of the Decretals, that if a Christian man or woman is convinced in his own mind and conscience that it would be a mortal sin to do or to leave undone some action, he must follow his own conscience even against the command of the authorities of the Church, and must submit patiently to Church censures and even excommunication; for it may well happen that the Church may condemn him whom God approves, or approve him whom God condemns.[24] This is no isolated or exceptional opinion, but is the doctrine which is constantly laid down in the canonical literature.[25] It is, I think, profoundly true to say that when men at last revolted against what seemed to them the exaggerated claims of the Church, when they slowly fought their way towards toleration and religious freedom, they were only asserting and carrying out its one most vital principle, the principle of the independence or autonomy of the spiritual life; the modern world is only fulfilling the Middle Ages.
I do not continue to develop this aspect of the progress of western civilization, not because it is unimportant, for indeed it is perhaps the greatest and most significant aspect of mediaeval life, but because it is well known to you, and indeed, it has generally been insisted on to such a degree as to obscure the other aspects of progress in the Middle Ages, with which we must deal.
And first I would ask you to observe that it was in these centuries that there were laid over again the foundations of the social and political order of civilization, and that there were devised those forms of the political order upon which the structure of modern society is founded.
We are familiar with the conception of the divine nature of political authority, the normal and fundamental mediaeval view of the State. If we translate this into more general terms we shall find that its meaning is that the State has an ethical or moral purpose or function; the State exists to secure and to maintain justice. You must not, indeed, confuse this great conception with that foolish perversion of it which was suggested, I think, by some characteristically reckless phrases of St. Augustine, stated in set terms by St. Gregory the Great, almost forgotten in the Middle Ages, and unhappily revived by the perversity of some Anglicans and Gallicans in the seventeenth century. This foolish perversion, which we know as the theory of the 'Divine Right of Kings', is indeed the opposite of the great Pauline and mediaeval conception of the divine nature of political authority, for to St. Paul, to the more normal Fathers like St. Ambrose, and to the political theory of the Middle Ages authority is divine just because, and only in so far as, its aim and purpose is the attainment and maintenance of justice. Indeed, it is not only the notion of the 'Divine Right' which was inconsistent with the mediaeval conception of the State, but the notion of an absolute sovereignty inherent in the State, that notion with which some eccentric or ignorant modern political theorists, ignorant of Rousseau as well as of Aristotle, have played, to the great danger of society; we have, indeed, got beyond the theory of the sovereignty of the king, but we are in some danger of being hag-ridden by the imposture of the sovereignty of the majority. Whatever mistakes the people of the Middle Ages may have made, they were, with rare exceptions, clear that there was no legitimate authority which was not just, and which did not make for justice.