1 Corinthians 15:2 "through which also you are obtaining salvation, if you bear in mind the words in which I proclaimed it -- unless indeed your faith has been unreal from the very first." (Weymouth New Testament)
Now let's return to the KJV.
Matthew 10:22 "And ye shall be hated of all men for my name's sake: but he that endureth to the end shall be saved."
Now ask yourself at what point these following words of Jesus are telling us that we will save our lives and also why Jesus there said we must save our lives by doing this if his death already saved us?
Mark 8:35 "For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the gospel's, the same shall save it."
Next we see Jesus gave us a lesson that it is how we walk which saves us: John 13:10 "Jesus saith to him, He that is washed needeth not save to wash his feet, but is clean every whit: and ye are clean, but not all."
Notice Paul, speaking to the church who were already believers, speaks future tense here: Romans 5:9 "Much more then, being now justified by his blood, we shall be saved from wrath through him."
And here also to the church and also future tense: Romans 5:10 "For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life."
So then, why does it sometimes seem to say it as though we are already saved? Romans 8:24 "For we are saved by hope: but hope that is seen is not hope: for what a man seeth, why doth he yet hope for?"
Jude 1:5 "I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not."
Matthew 24:13 "But he that shall endure unto the end, the same shall be saved."
Jude 1:23 “And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh.”
What if any of these got tired of being on that ark and jumped overboard? 2 Peter 2:5 “And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly”
1 Peter 4:18 “And if the righteous scarcely be saved, where shall the ungodly and the sinner appear?”
We must maintain that answer of a good conscience to be saved like not jumping off of that ark: 1 Peter 3:21 “The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ”
James 1:21 “Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls.”
Notice saving again as the thing we hope for by maintaining that good conscience:Hebrews 10:39 “But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul.”
And now for the earlier text reading of 1 Peter 2:2 “as newborn babes, long for the spiritual milk which is without guile, that ye may grow thereby unto salvation”
Hope this helps. There is much more there if you dig for it. Many yet need to see this, so learn it and share it.