with this existence! You do not understand your heart; therein lies the evil. You desire a real, external, objective immortality, a God out of yourselves. Here is the source of delusion. But as the heart releases man from the limits, even the essential limits of Nature; reason, on the other hand, releases Nature from the limits of external finiteness. It is true that Nature is the light and measure of reason;--a truth which is opposed to abstract Idealism. Only what is naturally true is logically true; what has no basis in Nature has no basis at all. That which is not a physical law is not a metaphysical law. Every true law in metaphysics can and must be verified physically. But at the same time reason is also the light of Nature;--and this truth is the barrier against crude materialism. Reason is the nature of things come fully to itself, re-established in its entireness. Reason divests things of the disguises and transformations which they have undergone in the conflict and agitation of the external world, and reduces them to their true character. Most, indeed nearly all, crystals--to give an obvious illustration--appear in Nature under a form altogether different from their fundamental one; nay, many crystals never have appeared in their fundamental form. Nevertheless, the mineralogical reason has discovered that fundamental form. Hence nothing is more foolish than to place Nature in opposition to reason, as an essence in itself incomprehensible to reason. If reason reduces transformations and disguises to their fundamental forms, does it not effect that which lies in the idea of Nature itself, but which, prior to the operation of reason, could not be effected on account of external hindrances? What else then does reason do than remove external disturbances, influences, and obstructions, so as to present a thing as it ought to be, to make the existence correspond to the idea; for the fundamental form is the idea of the crystal. Another popular example. Granite consists of mica, quartz, and feldspar. But frequently other kinds of stone are mingled with it. If we had no other guide and tutor than the senses, we should without hesitation reckon as constituent parts of granite all the kinds of stone which we ever find in combination with it; we should say yes to everything the senses told us, and so never come to the true idea of granite. But reason says to the credulous senses: Quod non. It discriminates; it distinguishes the essential from the accidental elements. Reason is the midwife of Nature; it explains, enlightens, rectifies and completes Nature. Now that which separates the essential from the non-essential, the necessary from the accidental, what is proper to a thing from what is foreign, which restores what has been violently sundered to unity, and what has been forcibly united to freedom,--is not this divine? Is not such an agency as this the agency of the highest, of divine love? And how would