And in such frame of mind the corruption of the Renaissance leaves us calm, and we know we had better turn our backs on it, and get from the Renaissance only what was good. Only, if we are physicians, or more correctly (since in a private capacity we all are) only _when_ we are physicians, must we handle the unwholesome. Meanwhile, if we wish to be sound, let us fill our soul with images and emotions of good; we shall tackle evil, when need be, only the better. And here, by the way, let me open a parenthesis to say that, of the good we moderns may get from occasional journeys into the Past, there is a fine example in our imaginary and emotional commerce with St. Francis and his joyous theology. For while other times, our own among them, have given us loftier morality and severer good sense, no period save that of St. Francis could have given us a blitheness of soul so vivifying and so cleansing. For the essence of his teaching, or rather the essence of his personality, was the trust that serenity and joyfulness must be incompatible with evil; that simple, spontaneous happiness is, even like the air and the sunshine in which his beloved brethren the birds flew about and sang, the most infallible antidote to evil, and the most sovereign disinfectant. And because we require such doctrine, such personal conviction, for the better living of our lives, we must, even as to better climates, journey forth occasionally into that distant Past of mediæval Italy; and as to the Ezzelinos, Borgias, and Riarios, and the foul-mouthed humanists, good heavens! why should we sicken ourselves with the thought of this long dead and done for abomination?