Its the Faith of Christ, but I cant prove it to you, thats Gods business
Nowhere do we read its Jesus faith that saves us its our faith in Him that we become saved.
Paul tells us in Ephesians 4:30 that believers are sealed for the day of redemption. If believers did not have salvation or eternal life/security then the sealing could not truly be until the day of redemption. Paul in Romans 8:38-39 really drives home the everlasting promise of eternal life/salvation for the believer "For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord." Our eternal security is bought with the blood of Christ, promised to us by the Father Who cannot deny Himself and sealed in the believers heart by the Holy Spirit. What wonderful promises believers have for their eternal security in Christ.
Jesus tells us in John 3:15-16 that whoever believes in Jesus Christ will have eternal life, not might have but actually possesses that everlasting life. If a person is promised eternal life and then to have it taken away then it was never eternal to begin with and it makes Jesus out to be a liar and the promises of God to be false. Below we see more promises the believer can count on for eternal life now and in the future. We can be confident in the promises of God.
John 3:16
16 "For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish,
but have eternal life.
John 3:36
"He who believes in the Son
has eternal life;
John 5:24
"Truly, truly, I say to you, he who hears My word, and believes Him who sent Me,
has eternal life, and does not come into judgment, but has passed out of death into life.
John 6:47
"Truly, truly, I say to you, he who believes
has eternal life.
John 6:54
54 "He who eats My flesh and drinks My blood
has eternal life, and I will raise him up on the last day.
John 10:27-30
"My sheep hear My voice, and I know them, and they follow Me; 28 and
I give eternal life to them,
and they will never perish; and no one will snatch them out of My hand. 29 "My Father, who has given them to Me, is greater than all; and no one is able to snatch them out of the Father's hand. 30 "I and the Father are one."
Matt 25:46
"These will go away into eternal punishment, but the righteous into eternal life."
1 John 3:14
We know that we have passed out of death into life,
1 John 5:13
These things I have written to you who believe in the name of the Son of God, so that
you may know that you have eternal life.
Hope this helps,