SCEPTICISM OF THE INSTRUMENT
organ taken from its native and natural water. I had worked out the development of those extraordinarily unsatisfactory and untrustworthy instruments, man's teeth, from the skin scutes of the shark to their present function as a basis for gold stoppings, and followed the slow unfolding of the complex and painful process of gestation through which man comes into the world. I had followed all these things and many kindred things by dissection and in embryology—I had checked the whole theory of development again in a year's course of palæontology, and I had taken the dimensions of the whole process, by the scale of the stars, in a course of astronomical physics. And all that amount of objective elucidation came before I had reached the beginnings of any philosophical or metaphysical inquiry, any inquiry as to why I believed, how I believed, what I believed, or what the fundamental stuff of things was.
Now following hard upon this interlude with knowledge, came a time when I had to give myself to teaching, and it became advisable to acquire one of those Teaching Diplomas that are so widely and so foolishly despised; and that enterprise set me to a superficial but suggestive study of educational method, of educational theory, of logic, of psychology, and so at last, when the little affair with the diploma was settled, to philosophy. Now to come to logic over the bracing uplands of comparative anatomy is to come to logic with a lot of very natural preconceptions blown clean out of one's mind. It is, I submit, a way of taking logic in the flank. When you have realised to the marrow, that all the physical organs of man
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