WHAT IS THE MEANING OF "CONVICTION".

Conviction is the work of the Holy Spirit where a person is able to see himself as God sees him.
Conviction functions differently for the 'true believer' and the 'non-believer'.  It is produced by:
-The Holy Spirit (showing the wrongness of our actions and provoking a true repentance),
-The Word of God (the continuity in learning His Will).
Both will develop 'Conscience' (God will judge people's secret thoughts through Jesus Christ), and how the Law act on the believer, and its consequences when it is not followed as commanded.
John16:8 says, "And He, when He comes, will 'convict' the World concerning Sin and Righteousness and Judgment."
If we do not desire by heart to follow the Word then we are in the World and we will be judge with the conviction that we preferred to be in it instead of being saved from it.
John15:18-25 says: Jesus Warns His Followers: "If the World hates you, remember that they hated Me first. If you belonged to the World, the World would love you as It loves its own people. But I have chosen You to Be Different from those in the World. So you do not belong to the World, and that is why the World hates you. Remember the lesson I told you:'Servants are not greater than their Master.' .. The people of the World will do to you whatever they did to Me, because you belong to Me. They do not know the One who sent Me. If I had not come and spoken to the people of the World, they would not be guilty of Sin. But now I have spoken to them. So they have 'no excuse' for their sin. Whoever hates Me also hates my Father. I did things among the people of the World that No One else has ever done. If I had not done those things, they would not be guilty of Sin. But they have seen what I did and still they hate Me and my Father. But this happened to make clear the full meaning of what is written in their Law: "They hated Me for no reason."
John3:19-21 says, "The Light has come into the World, and people loved the Darkness rather than the Light.. For everyone who does wicked things hates the Light and does not come to the Light, let his works should be exposed. But whoever does What Is True comes to the Light, so that it may be clearly seen that his works have been carried out in God."
2Corinthians 7:10 says,"For Godly grief produces a Repentance that leads to Salvation without regret, whereas Worldly grief produces Death."
Romans14:21-23 says,"It is good not to eat meat or drink wine or do anything that causes your brother to stumble .. Blessed is the one who has no reason to pass judgment on himself for what he approves. But whoever has doubts is condemned if he eats, because the eating is not from faith. For whatever does not proceed from Faith is Sin."
Psalm32:1-7 says,"Blessed is the one whose transgression is forgiven, whose sin is covered. Blessed is the man whom the Lord counts no Iniquity, and in whose spirit there is no Deceit. .. I acknowledged my sin to you, and I did not cover my Iniquity. I said, 'I will confess my transgressions to the Lord,' and You forgave the Iniquity of my sin."
John15:26 says,  "I will send You the Helper from the Father. The Helper is the Spirit of Truth who comes from the Father. When He comes, He will tell about Me. And You will tell people about Me too, because You have been with Me from the Beginning."
John16:4-15 says, "I did not tell you 'these things' at the beginning, because I was with You then. Now I am going 'back to the One Who sent Me'. And none of you asks Me, 'Where are you going?'
But you are filled with sadness because I have told you all this. Let Me assure you, 'it is better for You' that I go away, I say this because when I go away I will send the Helper to You. But if I did not go, the Helper would not come. When the Helper comes, He will show the people of the World how wrong they are about 'sin', about 'being Right with God', and about 'Jugdment'. He will prove that 'they are guilty of sin', because they 'do not believe in Me'.  He will show them how wrong they are about 'How to be Right with God.'The Helper will do this, because I am going to the Father. You will not see Me then. And He will show them 'How wrong their judgment is', because their Leader has already been condemned. I have so much more to tell you, but it is too much for you to accept now. But when the Spirit of Truth comes, He will 'lead you into all Truth.' He will not speak his own words. He will speak only 'what He hears' and 'will tell you what will happen in the future'."
"The Spirit of Truth will bring 'glory to Me' by telling You what He receives from Me. All that the Father has is mine. That is why I said that the Spirit will tell You What He receives from Me."
Amen