1 Peter 4:19

ὥστε. The view of suffering inculcated in the preceding verses enables Christians to glorify God for permitting them to suffer in Christ’s name, and they can do this with perfect trust because they can also (καί) feel that they are committing their souls (or lives) to the keeping of the God who made them, and He can be relied upon not to deal untruly with His own handiwork.

παρατίθεσθαι. In the sense of entrusting a deposit to safe keeping cf. our Lord’s dying words Luke 23:46 quoting Psalms 31:5 εἰς χεῖράς σου παρατίθεμαι τὸ πνεῦμά μου, cf. Acts 14:23; Acts 20:32; 1 Timothy 1:18; 2 Timothy 2:2.

κτίστης is used of God in the prayer of Jonathan, 2Ma 1:24, but does not occur elsewhere in the N.T.

ἐν�. The way in which Christians are to shew their trust is by continued well-doing in spite of their sufferings. There must be active obedience as well as patient endurance.