Every unity either participates in the One or is itself the One.
Πᾶν τὸ ἓν ἢ μετέχει τοῦ ἑνὸς ἢ αὐτοέν ἐστιν.

Philosophers
Proclus
Born 412 in Constantinople, Proclus was the last great philosopher of late antiquity, head of the Athenian Academy for nearly fifty years. His Elements of Theology, 211 propositions modelled on Euclid, threaded one line.
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Source: Elements of Theology, Prop. 4Verified