10.] This thought, which is proposed as the instrument of philosophic knowledge, itself calls for further explanation. We must understand in what way it possesses necessity or cogency: and when it claims to be equal to the task of apprehending the absolute objects (God, Spirit, Freedom), that claim must be substantiated. Such an explanation, however, is itself a lesson in philosophy, and properly falls within the scope of the science itself. A preliminary attempt to make matters plain would only be unphilosophical, and consist of a tissue of assumptions, assertions, and inferential pros and cons, _e.g._ of dogmatism without cogency, as against which there would be an equal right of counter-dogmatism. A main line of argument in the Critical Philosophy bids us pause before proceeding to inquire into God or into the true being of things, and tells us first of all to examine the faculty of cognition and see whether it is equal to such an effort. We ought, says Kant, to become acquainted with the instrument, before we undertake the work for which it is to be employed; for if the instrument be insufficient, all our trouble will be spent in vain. The plausibility of this suggestion has won for it general assent and admiration; the result of which has been to withdraw cognition from an interest in its objects and absorption in the study of them, and to direct it back upon itself; and so turn it to a question of form. Unless we wish to be deceived bywords, it is easy to see what this amounts to. In the case of other instruments, we can try and criticise them in other ways than by setting about the special work for which they are destined. But the examination of knowledge can only be carried out by an act of knowledge. To examine this so-called instrument is the same thing as to know it. But to seek to know before we know is as absurd as the wise resolution of Scholasticus, not to venture into the water until he had learned to swim. Reinhold saw the confusion with which this style of commencement is chargeable, and tried to get out of the difficulty by starting with a hypothetical and problematical stage of philosophising. In this way he supposed that it would be possible, nobody can tell how, to get along, until we found ourselves, further on, arrived at the primary truth of truths. His method, when closely looked into, will be seen to be identical with a very common practice. It starts from a substratum of experiential fact, or from a provisional assumption which has been brought into a definition; and then proceeds to analyse this starting-point. We can detect in Reinhold's argument a perception of the truth, that the usual course which proceeds by assumptions and anticipations is no better than a hypothetical and problematical mode of procedure. But his perceiving this does not alter the character of this method; it only makes clear its imperfections.