VI. And he left behind him some excellent books, which are these. One on Time; two on Zeno’s System of Natural Philosophy; four books of the Explanations of Heraclitus; one on Sensation; one on Art; one addressed to Democritus; one to Aristarchus; one to Herillus; two on Desire; one entitled Archæology; one on the Gods; one on the Giants; one on Marriage; one on Poets; three on Duty; one on Good Counsel; one on Favour; one called Exhortatory; one on Virtues; one on Natural Ability; one on Gorgippus; one on Enviousness; one on Love; one on Freedom; one called the Art of Love; one on Honour; one on Glory; The Statesman; one on Counsel; one on Laws; one on Deciding as a Judge; one on the Way of Life; three on Reason; one on the Chief Good; one on the Beautiful; one on Actions; one on Knowledge; one on Kingly Power; one on Friendship; one on Banquets; one on the Principle that Virtue is the same in Man and Woman; one on the Wise Man Employing Sophisms; one on Apophthegms; two books of Conversations; one on Pleasure; one on Properties; one on Doubtful Things; one on Dialectics; one on Modes; one on Categorems. VII. These are his writings. And he died in the following manner. His gums swelled very much; and, at the command of his physicians, he abstained from food for two days. And he got so well that his physicians allowed him to return to all his former habits; but he refused, and saying that he had now already gone part of the way, he abstained from food for the future, and so died; being, as some report, eighty years old, and having been a pupil of Zeno nineteen years. And we have written a playful epigram on him also, which runs thus:— I praise Cleanthes, but praise Pluto more; Who could not bear to see him grown so old, So gave him rest at last among the dead, Who’d drawn such loads of water while alive. LIFE OF SPHÆRUS. I. Sphærus, a native of the Bosphorus, was, as we have said before, a pupil of Cleanthes after the death of Zeno. II. And when he made a considerable advance in philosophy he went to Alexandria, to the court of Ptolemy Philopater. And once, when there was a discussion concerning the question whether a wise man would allow himself to be guided by opinion, and when Sphærus affirmed that he would not, the king, wishing to refute him, ordered some pomegranates of wax to be set before him; and when Sphærus was deceived by them, the king shouted that he had given his assent to a false perception. But Sphærus answered very neatly, that he had not given his assent to the fact that they were pomegranates, but to the fact that it was probable that they might be pomegranates. And that a perception which could be comprehended differed from one that was only probable. Once, when Mnesistratus accused him of denying that Ptolemy was a king, he said to him, “That Ptolemy was a man with such and such qualities, and a king.”[101]