Who sustains our salvation?

[Van]

Let's look at Colossians 1:23:

IF indeed you continue in the faith, stable and steadfast, not shifting from the hope of the gospel that you heard, which has been proclaimed in all creation under heaven, and of which I, Paul, became a minister.

Here the translations start off with a conditional "if indeed" (eige/G1489)

However the Greek word has within its range of meaning "since." Thus the verse could be translated as "Since you are persisting in the faith..." This view asks the question, "Since what" and the answer is "being reconciled to God."

Thus the proof of being reconciled is persisting in the faith and not shifting from the hope of the gospel! Our eternal security is provided by God protecting our credited faith, so we are unable to not persist if we are born anew.

 

[AustinC]

Jesus sustains our faith.

*Hebrews 12:2*
Looking to Jesus, the founder and perfecter of our faith, who for the joy that was set before him endured the cross, despising the shame, and is seated at the right hand of the throne of God.

*Hebrews 9:15-17,24*
Therefore he is the mediator of a new covenant, so that those who are called may receive the promised eternal inheritance, since a death has occurred that redeems them from the transgressions committed under the first covenant. For where a will is involved, the death of the one who made it must be established. For a will takes effect only at death, since it is not in force as long as the one who made it is alive.

For Christ has entered, not into holy places made with hands, which are copies of the true things, but into heaven itself, now to appear in the presence of God on our behalf.

*Hebrews 7:25*
Consequently, he is able to save to the uttermost those who draw near to God through him, since he always lives to make intercession for them.

*Luke 22:31-32*
“Simon, Simon, behold, Satan demanded to have you,that he might sift you like wheat, but I have prayed for you that your faith may not fail. And when you have turned again, strengthen your brothers.”

 

[Van]

Hebrews 12:1b-2 (NASB)
let’s run with endurance the race that is set before us, looking only at Jesus, the originator and perfecter of the faith, who for the joy set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.

The Greek word translated "originator" is also translated as "author" and refers to the One who provides the initial basis for "the faith." The Greek word translated "perfecter" is also translated "completer or finisher" of the faith, and refers to the fact Christ provides everything of which "the faith" is comprised. As with Alpha and Omega, Christ is both the initiator and completed embodiment of "the faith."

This verse does not say nor suggest Christ sustains our faith.

However take a look at 1 Peter 1:3-5. Here our faith is "kept" by the power of God, which of course includes Christ, the Second Person of the Trinity.