When Darius offered him two million pounds, and also offered to share Asia equally with him, Parmenio said, ‘I would take it if I were Alexander.’ ‘And so indeed would I,’ said Alexander, ‘if I were Parmenio.’ But he made answer to Darius that the earth could not tolerate two suns, nor Asia two kings. 1
1 Cf. Plutarch's Life of Alexander, chap. xxix. (681 F): Arrian, Anabasis, ii. 25; Diodorus, xvii. 54: Longinus, De sublimitate, ix. 4; Valerius Maximus, vi. 4, ext. 3.