"Common Logic is the Grammar of the higher Speech, that is, of Thought; it examines merely the relations of ideas to one another, the Mechanics of Thought, the pure Physiology of ideas. Now logical ideas stand related to one another, like words without thoughts. Logic occupies itself with the mere dead Body of the Science of Thinking. — Metaphysics, again, is the Dynamics of Thought; treats of the primary Powers of Thought; occupies itself with the mere Soul of the Science of Thinking. Metaphysical ideas stand related to one another, like thoughts without words. Men often wondered at the stubborn Incompletibility of these two Sciences; each followed its own business by itself; there was a want everywhere, nothing would suit rightly with either. From the very first, attempts were made to unite them, as everything about them indicated relationship; but every attempt failed; the one or the other Science still suffered in these attempts, and lost its essential character. We had to abide by metaphysical Logic, and logical Metaphysic, but neither of them was as it should be."

“Many counterrevolutionary books have been written in favor of the Revolution. But Burke has written a revolutionary book against the Revolution.”

“Goethe is an altogether practical Poet. He is in his works what the English are in their wares: highly simple, neat, convenient and durable. He has done in German Literature what Wedgwood did in English Manufacture. He has, like the English, a natural turn for Economy, and a noble Taste acquired by Understanding. Both these are very compatible, and have a near affinity in the chemical sense.”

“We are on a mission: we are called to the cultivation of the earth.”

“Life is a disease of the spirit; a working incited by Passion. Rest is peculiar to the spirit.”

“Now to Some it appears not at all worth while to follow out the endless divisions of Nature; and moreover a dangerous undertaking, without fruit and issue. As we can never reach, say they, the absolutely smallest grain of material bodies, never find their simplest compartments, since all magnitude loses itself, forwards and backwards, in infinitude; so likewise is it with the species of bodies and powers; here too one comes on new species, new combinations, new appearances, even to infinitude. These seem only to stop, continue they, when our diligence tires; and so it is spending precious time with idle contemplations and tedious enumerations; and this becomes at last a true delirium, a real vertigo over the horrid Deep”

“Sleep is for the inhabitants of Planets only. In another time, Man will sleep and wake continually at once. The greater part of our Body, of our Humanity itself, yet sleeps a deep sleep.”