Neither God, nor the human soul, nor the world are really what we consider them. Our thoughts of these are only the endemic forms in which the planet we inhabit hands them to us. Our brain belongs to this planet; accordingly, also, the idioms of our ideas, which are treasured up in it. But the power of the soul is peculiar, necessary, and always consistent: the capricious nature of the materials through which it finds expression changes nothing in the eternal laws, as long as this capriciousness does not stand in contradiction with itself, and so long as the sign remains true to the thing it designates. As the thinking power develops the relations of the idioms, these relations of things must also really be present in them. Therefore, truth is no property of the idioms, but of the conclusion; it is not the likeness of the sign with the thing signified, of the conception with the object; but the agreement of this conception with the laws of thought. In a similar manner, the doctrine of quantity makes use of cyphers which are nowhere present, except upon paper, and yet it finds with them what is present in the world of reality. For example, what resemblance is there between the letters A and B, the signs : and =, +, and -, and the fact that has to be ascertained? Yet the comet, foretold centuries before, advances from a remote corner of the heavens and the expected planet eclipses the disk at the proper time. Trusting to the infallibility of his calculation, the discoverer Columbus plunges into unknown regions of the sea to seek the missing other half of the known hemisphere--the great island of Atlantis--to fill up a blank in his geographical map. He found this island of his paper calculation, and his calculation was right. Would it have been less great if a hostile storm had shattered his fleet or driven it back? The human mind makes a similar calculation when it measures the super-sensual by means of the sensible, and when mathematics applies its conclusions to the hidden physics of the superhuman. But the last test of its calculations is still wanting, for no traveller has come back from that land to relate his discovery. Human nature has its proper bounds, and so also has the individual. We will give each other mutual comfort respecting the former: Raphael will concede this to the boyish age of his Julius. I am poor in conceptions, a stranger in many branches of knowledge which are thought to be essential in inquiries of this nature. I have not belonged to any philosophical school, nor have I read many printed books. It may quite well be that I occasionally substitute my fancies in the place of stricter logical proofs, that I mistake the rush of my blood or the hopes of my heart for sound wisdom; yet, my dear friend, you must not grudge me the moments I have thus lost. It is a real gain for universal perfection: it was the provision of the Wisest Spirit that the erring reason should also people the chaotic world of