attained to an oblivion of all evil, and shun the overpowering envy that follows me, and the vanity of high position, shall not come to Persia. I am content with little and live in my own way.” The only work that he wrote, and the title of which, Diogenes tells us, was by some stated to be “The Muses” and by others “On Nature,” he deposited in the temple of Diana at Ephesus. It seems to have been preserved until modern times; the fragments which have come down to us are collected together in Stephanus’ _Poësis philosophica_ (p. 129, seq.). Schleiermacher also collected them and arranged them in a characteristic way. The title is “Heraclitus, the Dark, of Ephesus, as represented in fragments of his work and by the testimony of the ancients,” and it is to be found in Wolf and Buttmann’s “Museum of ancient Learning,” vol. I. (Berlin, 1807) pp. 315-533. Seventy-three passages are given. Kreuzer made one hope that he would work at Heraclitus more critically and with a knowledge of the language. He made a more complete collection, particularly from grammarians; however, as, for lack of time, he left it to be worked up by a younger scholar, and as the latter died, it never came before the public. Compilations of the kind are as a rule too copious: they contain a mass of learning and are more easily written than read. Heraclitus has been considered obscure, and is indeed celebrated for this; it also drew upon him the name of _σκοτεινός_. Cicero (De Nat. Deor. I. 26; III. 14; De Finib. II. 5) takes up a wrong idea, as often happens to him; he thinks that Heraclitus purposely wrote obscurely. Any such design would, however, be a very shallow one, and it is really nothing but the shallowness of Cicero himself ascribed by him to Heraclitus. Heraclitus’ obscurity is rather a result of neglecting proper composition and of imperfect language; this is what was thought by Aristotle (Rhet. III. 5), who, from a grammatical point of view, ascribed it to a want of punctuation: “We do not know whether a word belongs to what precedes or what succeeds.” Demetrius is of the same opinion (De Elocutione, § 192, p. 78, ed. Schneider). Socrates, as Diogenes Laertius relates (II. 22; IX. 11-12), said of this book: “What he understood of it was excellent, and what he did not understand he believed to be as good, but it requires a vigorous (_Δηλίου_) swimmer to make his way through it.” The obscurity of this philosophy, however, chiefly consists in there being profound speculative thought contained in it; the Notion, the Idea, is foreign to the understanding and cannot be grasped by it, though it may find mathematics quite simple.