I agree that the #1 definition of faith is trust but would also add to it confidence, reliance, belief, and assurance in who Christ is and what he accomplished for us.
Confidence, reliance, belief, assurance, are all a part of trust. Believing Jesus saves.
What are you referring to when you use the term "saving faith"? So, trust is not something we do, or will do? Who does the trusting?
The faith that saves. The faith given is believing that Jesus is who He says He is and did what He says He did. The faith is in Jesus.
Is it available for the living word of God to cut through someone's heart?
It is called the living word of God because His word is Him. It accomplishes that for which He sends it out. If someone isn't brought to life by it, He did not send it to do that---at least not at that moment. I heard it, read it, many times and didn't believe it. Until I did.
So, we only trust because God quickens us first? (Doesn't sound like
Ephesians 1:13 to me) We don't trust in Christ first and because of our trust in Christ - God quickens us?
Eph 1:13-14
In Him you also trusted, after you heard the word of truth, the gospel of your salvation, in whom also, having believed, you were sealed with the Holy Spirit of promise, who is the guarantee of our inheritance until the redemption of the purchased, to the praise of His glory.
This is not Paul giving a chronological order of salvation. He is saying that if you believed the gospel, you are saved and when that happened you were sealed with the Holy Spirit, which is our assurance that all the promises of salvation, the fulness of our redemption is secure.
From our definitions let's look at the verse in question again: For by God's unmerited favor you have been saved through trust. And that [the result- salvation] not of yourselves: it is the gift of God. Not of works [works of the law; see previous verses to GA], lest any man boast.
IOW, I can't boast in keeping dietary laws, in keeping thecsabbath, etc. because that had nothing to do with it! My salvation is dependent on my trust in Christ.
Salvation and faith are equal to each other. Not separate occurrences. You cannot take this verse legitimately to be saying that our faith causes God to grant us salvation. That would no longer be grace. It would be our faith, found within ourselves all by ourselves. It would be the natural man being the quickening power that ignites God's grace or salvation. It is not feasible, knowing what we know of God, that salvation is a gift, but useless He also gives us what is necessary to attain salvation.
And there is nothing that suggests that when Paul says "Not of works," that he is referring to the Mosaic covenant law.