Deliverance from unbelief ! -
Unbelief is one of the sins that the elect world is saved from, thats the significance of this portion jn 16:8-9.
The Holy Spirit convicts the elect unbeliever of sin and gives them faith.
Paul is an example, he was an elect who in unbelief rejected Jesus christ and persecuted His followers, being blinded by the god of this world, but when it pleased God, He revealed in Him Jesus christ and he became a believer.
1 tim 1:
12And I thank Christ Jesus our Lord, who hath enabled me, for that he counted me faithful, putting me into the ministry;
13Who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief.
14And the grace of our Lord was exceeding abundant with faith [to believe] and love which is in Christ Jesus.
15This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
Being saved experimentally is being delivered from unbelief .
16Howbeit for this cause I obtained mercy, that in me first Jesus Christ might shew forth all longsuffering, for a pattern to them which should hereafter believe on him to life everlasting.
The Fact is, no one Jesus christ died to save, can ever die in unbelief, that would defeat one of the main purposes of His death accomplishments.