εἰ γὰρ ... εὐθύνοι: A wish that runs over into a condition. See O. 1.108.
ὁ πᾶς χρόνος: All time to come, O. 6.56; N. 1.69.
οὕτω: “As heretofore.”
εὐθύνοι: Cf. N. 2.7: εὐθυπομπὸς αἰών. The nautical image was still in the poet's eye. Cf. v. 34 and O. 13.28: Ξενοφῶντος εὔθυνε δαίμονος οὖρον.
καμάτων δ᾽ ἐπίλασιν: Victory brings serenity (O. 1.98); breathing space (O. 8.7); tranquillity (N. 9.44). Hieron suffered with the stone.