INTRODUCTION.

from the less general to the more general, and are tested by their consequences; the puzzle about greater and less; the resort to the method of ideas, which to us appear only abstract terms,—these are to be explained out of the position of Socrates and Plato in the history of philosophy. They were living in a twilight between the sensible and the intellectual world, and saw no way of connecting them. They could neither explain the relation of ideas to phenomena, nor their correlation to one another. The very idea of relation or comparison was embarrassing to them. Yet in this intellectual uncertainty they had a conception of a proof from results, and of a moral truth, which remained unshaken amid the questionings of philosophy. (2) The other is a difficulty which is touched upon in the Republic as well as in the Phaedo, and is common to modern and ancient philosophy. Plato is not altogether satisfied with his safe and simple method of ideas. He wants to have proved to him by facts that all things are for the best, and that there is one mind or design which pervades them all. But this 'power of the best' he is unable to explain; and therefore takes