It is curious to note in how many particulars this process of acquiring knowledge is opposed to that of the modern scientific man. Observe specially that Socrates wishes to investigate every reality by itself, while we, on the contrary, fly from nothing with so much vehemence as from an isolated fact; it maddens us until we can put it into relation with other facts, and delights us in proportion to the number of facts with which we can relate it. In that book of multitudinous suggestions which Novalis (Friedrich Von Hardenberg) calls _The Pupil at Sais_, one of the most modern sentences is that where, after describing many studies of his wondrous pupil, Novalis adds that "erelong he saw nothing alone." Surely, one of the earliest and most delightful sensations one has in spiritual growth, after one has acquired the true synthetic habit which converts knowledge into wisdom, is that delicious, universal impulse which accompanies every new acquisition as it runs along like a warp across the woof of our existing acquisition, making a pleasant tang of contact, as it were, with each related fibre. But Plato speaks even more directly upon our present point, in advocating a similar attitude towards physical science. In Book VII. of the _Republic_, he puts these words into the mouth of Socrates: "And whether a man gapes at the heavens, or blinks on the ground, seeking to learn some particular of sense, I would deny that he can learn, for nothing of that sort is matter of science." Of course these, as the opinions of professed idealists, would not be representative of the Greek attitude towards physical science. Yet when we turn to those who are pre-eminently physical philosophers, we find that the mental disposition, though the reverse of hostile, is nearly always such as to render the work of these philosophers unfruitful. When we find, for example, that Thales in the very beginning of Greek philosophy holds the principle, or beginning, ἡ ἀρχἡ of all things to be moisture, or water; that Anaximenes a little while after holds the beginning of things to be air; that Heraclitus holds the _arche_ to be fire: this _sounds_ physical, and we look for a great extension of men's knowledge in regard to water, air and fire, upon the idea that if these are really the organic principles of things, thousands of keen inquiring eyes would be at once leveled upon them, thousands of experiments would be at once set on foot, all going to reveal properties of water, air and fire.