2 Timothy 1:14

τὴν καλὴν παραθήκην : The faith, which is a ὑποτύπωσις in relation to the growing apprehension of it by the Church, is a παραθήκη, deposit, in the case of each individual. On the constant epithet καλός see 1 Timothy 1:18, and on παραθήκη 1 Timothy 6:20. There is a special force in καλήν here, as distinguishing the precious faith from τὴν παραθήκην μου of 2 Timothy 1:12.

φύλαξον διὰ Πνεύματος Ἁγίου : φυλάσσειν is more than ἔχειν : it implies here final perseverance; and that can only be attained through the Holy Spirit. God must co-operate with man, if man's efforts are to be successful. Cf. “Work out your own salvation … for it is God which worketh in you” (Philippians 2:12-13).

Πνεύματος Ἁγίου : This verse and Titus 3:5 are the only places in the Pastorals in which the Holy Spirit is mentioned.