You have a hard time understanding the truth of scripture below, I don't know why, it's plain and simple.
You aren't saved until your (Sealed) by the Holy Spirit, this puts a believer in the (Father's Hand) your name is in the Lambs Book of Life, Eternal Security 100%.
Do you deny eternal security as seen below, is there somebody bigger than the (Father) that will remove the Christian from his hand?
The believer is sealed by the Holy Spirit, unto the day of redemption.
Ephesians 4:30KJV
30 And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
The Holy Bible (Clearly) teaches eternal security, as (Clearly) seen below.
John 10:27-30KJV
27 My sheep hear my voice, and I know them, and they follow me:
28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
29 My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.
30 I and my Father are one.