Hegel is fond of repeating that all philosophies still live and that the earlier are preserved in the later; they are refuted, and they are not refuted, by those who succeed them. Once they reigned supreme, now they are subordinated to a power or idea greater or more comprehensive than their own. The thoughts of Socrates and Plato and Aristotle have certainly sunk deep into the mind of the world, and have exercised an influence which will never pass away; but can we say that they have the same meaning in modern and ancient philosophy? Some of them, as for example the words 'Being,' 'essence,' 'matter,' 'form,' either have become obsolete, or are used in new senses, whereas 'individual,' 'cause,' 'motive,' have acquired an exaggerated importance. Is the manner in which the logical determinations of thought, or 'categories' as they may be termed, have been handed down to us, really different from that in which other words have come down to us? Have they not been equally subject to accident, and are they not often used by Hegel himself in senses which would have been quite unintelligible to their original inventors--as for example, when he speaks of the 'ground' of Leibnitz ('Everything has a sufficient ground') as identical with his own doctrine of the 'notion' (Wallace's Hegel), or the 'Being and Not-being' of Heracleitus as the same with his own 'Becoming'? As the historical order of thought has been adapted to the logical, so we have reason for suspecting that the Hegelian logic has been in some degree adapted to the order of thought in history. There is unfortunately no criterion to which either of them can be subjected, and not much forcing was required to bring either into near relations with the other. We may fairly doubt whether the division of the first and second parts of logic in the Hegelian system has not really arisen from a desire to make them accord with the first and second stages of the early Greek philosophy. Is there any reason why the conception of measure in the first part, which is formed by the union of quality and quantity, should not have been equally placed in the second division of mediate or reflected ideas? The more we analyze them the less exact does the coincidence of philosophy and the history of philosophy appear. Many terms which were used absolutely in the beginning of philosophy, such as 'Being,' 'matter,' 'cause,' and the like, became relative in the subsequent history of thought. But Hegel employs some of them absolutely, some relatively, seemingly without any principle and without any regard to their original significance.