But consciousness is only a witness,--it makes what is appear; it creates nothing. It is not because consciousness announces it to you, that you have produced such or such a movement, that you have experienced such or such an impression. Neither is it because consciousness says to us that reason is constrained to admit such or such a truth, that this truth exists; it is because it exists that it is impossible for reason not to admit it. The truths that reason attains by the aid of universal and necessary principles with which it is provided, are absolute truths; reason does not create them, it discovers them. Reason is not the judge of its own principles, and cannot account for them, for it only judges by them, and they are to it its own laws. Much less does consciousness make these principles, or the truths which they reveal to us; for consciousness has no other office, no other power than in some sort to serve as a mirror for reason. Absolute truths are, therefore, independent of experience and consciousness, and at the same time, they are attested by experience and consciousness. On the one hand, these truths declare themselves in experience; on the other, no experience explains them. Behold how experience and reason differ and agree, and how, by means of experience, we come to find something which surpasses it. So the philosophy which we teach rests neither upon hypothetical principles, nor upon empirical principles. It is observation itself, but observation applied to the higher portion of our knowledge, which furnishes us with the principles that we seek, with a point of departure at once solid and elevated.[24] This point of departure we have found, and we do not abandon it. We remain immovably attached to it. The study of universal and necessary principles, considered under their different aspects, and in the great problems which they solve, is almost the whole of philosophy; it fills it, measures it, divides it. If psychology is the regular study of the human mind and its laws, it is evident that that of universal and necessary principles which preside over the exercise of reason, is the especial domain of psychology, which in Germany is called rational psychology, and is very different from empirical psychology. Since logic is the examination of the value and the legitimacy of our different means of knowing, its most important employment must be to estimate the value and the legitimacy of the principles which are the foundations of our most important cognitions. In fine, the meditation of these same principles conducts us to theodicea, and opens to us the sanctuary of philosophy, if we would ascend to their true source, to that sovereign reason which is the first and last explanation of our own. FOOTNOTES: [18] 1st Series of our Course, vol. i. [19] 1st Series, vol. i. [20] Ibid. [21] 1st Series, vol. i., Fragments of the Course of 1817. [22] See that criticism, 1st Series, vol. v., _Kant_, lecture 8.