Note 35 — Chapter I · SPECULATIVE PHILOSOPHY IN GREECE, BEFORE AND IN THE TIME OF SOKRATES.
Reading edition
Aristot. Metaph. M. 6, p. 1080, b. 18. τὸν γὰρ ὅλον οὔρανον κατασκευάζουσιν ἐξ ἀριθμῶν. Compare p. 1075, b. 37, with the Scholia.
A poet calls the tetraktys (consecrated as the sum total of the first four numbers 1 + 2 + 3 + 4 = 10) πηγὴν ἀενάου φύσεως ῥιζώματ’ ἔχουσαν. Sextus Empiric. adv. Mathemat. vii. 94.