Such, in outline, were the systems against which the Stoic philosophy had to make good its position in the ancient world. From the first there seems to have been no doubt of its ability to do so, although, unhappily, the records which have been preserved of the teaching of its earliest days are few and obscure. The writings of Zeno, the founder of Stoicism, and of Chrysippus, his immediate successor in the leadership of the school, have utterly perished, while of Cleanthes, the third of the early Stoic teachers, very little remains beyond the profound and majestic Hymn to Zeus, of which I have given a translation in this work. The complete loss of the hundreds of treatises produced by Chrysippus is especially to be regretted, as he appears to have taken the main part in giving shape and system to the Stoic philosophy. “Had Chrysippus not been, the Stoa had not been,” was a proverbial saying which testifies to his fame. However, from the accounts of ancient philosophers in Diogenes Laertius, from Plutarch, Seneca, Cicero, and a few other authorities, we can learn pretty clearly what the framework of the Stoic system had grown to be long before Epictetus began to study it. In antiquity, a philosophic system was expected to have something to say for itself on three different branches of study—Logic, Physics (which included cosmogony and theology), and Ethics. We think of the Stoics chiefly in connection with the last-named of these subjects, but they were no less eminent in the others, and Chrysippus, in particular, was held to have done so much for the science of logic that a saying was current—“If there were dialectic among the Gods, it must be the dialectic of Chrysippus.” Of the Stoic contributions to this science, scarcely any record remains.