[Sidenote: C] Mathematicians tell us that lines and surfaces, being mental perceptions and incorporeal, have in themselves no such thing as bending, stretching, or motion, but that they are bent, stretched, and changed in position along with the bodies of which they are the boundaries. So you will discover that, with the time-server, his assent, his opinion, even his pleasure and anger, are always dependent. Here, therefore, it is perfectly easy to detect the difference. It is still more apparent in the manner in which a service is rendered. With the good feeling of a friend, as with a living creature, its most vital functions lie [Sidenote: D] deep. It is marked by no ostentatious display; but very often, like a physician who conceals the fact that he is doctoring you, a friend does you a good turn by a word of intercession or by bringing about an understanding, and so consults your interests without your knowing it. Arcesilaus was a man of this type. Not to mention other instances, when Apelles the Chian was ill and Arcesilaus had discovered how poor he was, he came back later with twenty drachmae. Taking a seat close to him, he exclaimed, ‘There is nothing here beyond Empedocles’ four elements: _Fire and water and earth and the gentle air of the heavens._ Why, even your bed is made all askew.’ With that he moved his pillow and meanwhile slipped the coins under it. When the [Sidenote: E] old woman in attendance found them and told Apelles in amazement, he laughed and said, ‘It is that thief Arcesilaus.’[52] And here we may note how philosophy produces ‘_children like unto their sires_‘. Cephisocrates, who had been impeached, was on his trial, and beside him, with the rest of his friends, stood Lacudes, one of the coterie of Arcesilaus. The accuser having asked for his ring, Cephisocrates quietly dropped it at his side, and Lacudes, who noticed the action, put his foot upon it and hid it. On that ring depended the proof of the charge. When Cephisocrates, after his acquittal, went shaking hands with members of the jury, one of them, who had apparently [Sidenote: F] seen what occurred, bade him thank Lacudes, and gave an account of the affair, which Lacudes had mentioned to no one. We may believe that it is the same with the Gods, and that for the most part they confer their benefits unperceived, it being their nature to find pleasure in the mere act of bestowing favours and doing good. But in a deed done by a flatterer there is nothing honest, sincere, single-minded, or generous. It is a case of sweating, bawling, bustling, and of a tense look upon the face, intended to convey the impression of arduous and urgent business. The thing resembles, in fact, an overdone painting, [Sidenote: 64] which strives to secure realistic effect by the use of blatant colours and affected folds, wrinkles, and angles.