alien to her essence. She should return, after her baffling and stupefying intercourse with the world of sense and accident, into the native heaven of her ideas. For animal desires were no less illusory, and yet no less significant, than sensuous perceptions. They engaged man in the pursuit of the good and taught him, through disappointment, to look for it only in those satisfactions which can be permanent and perfect. Love, like intelligence, must rise from appearance to reality, and rest in that divine world which is the fulfilment of the human.
A geometrician does a good service when he declares and explicates the nature of the triangle, an object suggested by many casual and recurring sensations. His service is not less real, even if less obvious, when he arrests some fundamental concretion in discourse, and formulates the first principles of logic. Mastering such definitions, sinking into the dry life of such forms, he may spin out and develop indefinitely, in the freedom of his irresponsible logic, their implications and congruous extensions, opening by his demonstration a depth of knowledge which we should otherwise never have discovered in ourselves. But if the geometer had a fanatical zeal and forbade us to consider space and the triangles it contains otherwise than as his own ideal science considers them: forbade us, for instance, to inquire how we came to perceive those triangles or that space; what organs and senses conspired in fur-
