ἐπὶ ξυροῦ γὰρ ἀκμῆς ἔχεται ἡμῖν τὰ πρήγματα → our affairs are balanced on a razor's edge, our affairs are set upon the razor's edge
στροφαί: «ἀστραπαὶ» Ἡσύχ.
(see also: στροφή) prevarication, shifting, evasions, shifts