Such, then, is instinct, the sub-conscious fatality of Nature so difficult to control; whose unrestrained activity is capable of completely destroying the rhythm of the complex vision. Nothing but the power of the apex-thought of man's whole concentrated being is able to dominate this thing. It may be detected lurking in the droop of the Sphinx's eyelids and in the cruel smile upon her mouth. But the answer given to the challenge of this subterranean force is not, after all, any logical judgment of the pure reason. It is the answer of the vision of the artist, holding its treacherous material under his creative hand. Let us turn now to the attribute of "intuition." Intuition is a thing more clearly definable and more easily analysed than almost any other of the aspects of the soul. Intuition is the feminine counterpart of imagination; and, as compared with instinct, it is a power which acts in clearly denned, isolated, intermittent movements, each one of which has a definite beginning and a definite end. As compared with imagination, intuition is passive and receptive; as compared with instinct it does not fumble and grope forward, steadily and tenaciously, among the roots of things; but it suspends itself, mirror-like, upon the surface of the unfathomable waters, and suspended there reflects in swift sudden glimpses the mysterious movements of the great deep. In this process of reflecting, or apprehending in sudden, intermittent glimpses, the mysterious depths of the life of the soul, intuition is less affected by the reason or by the will than any other aspect of the complex vision. Instinct, in secret sub-conscious alliance with the will, is a permanent automatic energy, working in the hidden darkness of the roots of things like an ever-flowing subterranean stream. The revelations of intuition, on the other hand, are not flowing and constant, but separate, isolated, distinct and detached. In the subject-matter of their revelations, too, intuition and instinct are very different. If the recesses of the soul be compared to a fortified castle, instinct is the active messenger of the place, continually issuing forth on secret errands concerning the real nature of which he is himself often quite ignorant. Intuition, on the contrary, is the little postern gate at the back of the building, set open at rare moments to the wide fields and magical forests which extend to the far-off horizon. Instinct is always found in close contact with sensation, groping its ways through the midst of the mass of material impressions, acting and reacting as it fumbles among such impressions. Intuition seems to deal directly and absolutely with a clear and definite landscape behind the superficial landscape, with a truth behind truth, with a reality within reality.