Faithful is he that calls you, who also will do it.
All Commentaries on 1 Thessalonians 5:24 Go To 1 Thessalonians 5
John Chrysostom
AD 407
Observe his humility. For, because he had prayed, Think not, he says, that this happens from my prayers, but from the purpose, with which He called you. For if He called you to salvation, and He is true, He will certainly save you, in that He wills it.