<p>5:24 <i>Faithful is He that calls you, who will also do it</i>- We are called to salvation. To get us there, as it were, the Spirit is being used to transform us and then to finally change us at the Lord's return from mortal to immortal; see on :23. Paul here simply states that we have been called to this, and He really will do it. This repeats the argument in Romans 8- that we were called to be saved, and so the Spirit will work to transform the called into a position whereby they will actually be saved.</p>