Retracing once more our steps over this perilous bridge of ultimate thought, we may thus indicate the situation. Our starting-point cannot be the "a priori synthetic unity of apperception," because this is an abstraction of the pure reason, and if accepted as a real fact would contradict and negate all the other attributes of the soul. Our starting-point cannot be the universal "monad" of self-consciousness, because this is an abstraction of the "I am I" and if accepted as a real fact would negate and suppress every attribute of the soul except the attributes of self-consciousness and emotion. Our starting-point cannot be the objective world, considered in its evolutionary externality, because this external world depends for its very existence upon the attributes of the soul, especially upon the attribute of sensation. Our starting-point can therefore be nothing less than the complex vision, which on the one hand implies the reality of the soul and on the other the reality of the external world, and which itself is the vision of a real concrete personality. The individual is thus disclosed as something more than the universal, the microcosm as something more than the macrocosm, and any living personality as something more than any conceivable absolute being. By an original act of faith, towards which we are helped by the soul's attribute of imagination, we are compelled to conceive of every other soul in the world as being the centre of a universe more or less identical in character with the universe of which our own soul is the centre. These separate universes we have to conceive as being subjective impressions of the same objective reality, the beauty, truth, and goodness of which are guaranteed for us by those "invisible companions of men" in whose eternal vision they find their synthesis. The tragedy of our life consists in the fact that it is only in rare exalted moments, when the rhythmic harmony of the complex vision is most intense and yet most calm, that the individual soul feels the presence of those supreme companions whose real and personal existence I have attempted to indicate. These ideal and yet most real companions of humanity make their presence felt by the soul in just the same immediate, direct and equivocal way in which we feel the influence of a friend or lover whose spirit, in his bodily absence, is concentrated upon our spirit, even as ours is upon his.