ἡ σωτηρία γὰρ αὕτη τῆς πίστεως ἡμῶν, which might be rendered, “this our salvation by faith,” or, with Milles, “this safety of our Faith.”  For the rendering in the text compare Heb. iii. 1:  ἀρχιερέα τῆς ὁμολογίας ἡμῶν.  On εὑρεσιλογία, see Polybius xviii. 29, § 3:  διὰ τῆς προς ἀλλήλους εὑρεσιλογίας.