ἐπειδήπερ
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (Strong)
from ἐπειδή and περ; since indeed (of cause): forasmuch.
English (Thayer)
(ἐπειδή περ Lachmann), conjunction (from ἐπεί, δή and περ), seeing that, forasmuch as; Itala and Vulg. quoniam quidem, since now (cf. Winer's Grammar, 448 (417)): Aristotle, phys. 8,5 (p. 256b, 25); Dionysius Halicarnassus 2,72; Philo ad Gai. § 25, and Attic writings from Thucydides down.)
Russian (Dvoretsky)
ἐπειδήπερ: conj. тж. раздельно так как, ведь NT.
