Matthew 10:22

ὁ δὲ ὑπομείνας εἰς τέλος κ.τ.λ. The parallel expression Luke 21:19 is made clear by this verse, ἐν τῇ ὑπομονῇ ὑμῶν κτήσεσθε τὰς ψυχὰς ὑμῶν, ‘by your patience ye shall win for yourselves your souls,’ i.e. win your true life by enduring to the end. Comp. Romans 5:3-5, καυχῶμεθα ἐν ταῖς θλίψεσιν εἰδότες ὅτι η θλίψις ὑπομονὴν κατεργάζεται ἡ δὲ ὑπομονὴ δοκιμὴν, ἡ δὲ δοκιμὴ ἐλπίδα ἡ δὲ ἐλπὶς οὐ καταισχύνει.

σωθήσεται. ‘Shall be saved,’ shall win σωτηρία. In classical Greek σωτηρία means, ‘safety,’ ‘welfare,’ i.e. life secure from evil, cp. Luke 1:71; in the Christian sense it is a life of secured happiness, hence ‘salvation’ is the highest sense. So σώζεσθαι = ‘to live securely’ with an additional notion of rescue from surrounding danger, οἱ σωζόμενοι means those who are enjoying this life of blessed security.