2 Thessalonians 2:10 proclaims they are on their way to hell because they have said no to the Truth; they have refused to believe it and love it and let it save them.
Jesus, the personal revelation of God in the flesh, promised that by knowing the truth we would be set free. We know this is true for we know of many who have brought great harm to themselves because of the lies they believed about themselves.
When we make a bad purchase, when all the information that was true wasn’t quite revealed, we realize again the truth that knowing the truth will set us free from personal and financial headaches.
There is an ultimate truth, a truth that determines the eternal destiny of everyone. Jesus said He is the Truth and His Truth is that He is God in person, made visible so that we could know God and trust God for the salvation of our souls when we pass from this life into the next.
The modern definition of truth is that each person decides what is true for themselves but the foolishness of such a belief is obvious in math, science, and relationships. We would all be miserable if engineers built bridges and structures based upon whatever truth they believed. So too with doctors.
And just because we believe something to be true doesn’t mean our significant other does and they let us know sometimes how untrue our truth really is! So too if there is a God doesn’t it make sense He would want us to know Who He really is so that we could please Him the way He wants? God thinks so and communicated as much when He came to us in Jesus.
Many people aren’t comfortable with this idea that there is only one God and that He has a personality, character, will and ways He expects all of humanity to obey and emulate.
They have said no to Truth in order to say yes to the god of their imagination, the way of their own choosing. Except this god cant keep them from death nor guarantee them entrance into heaven.
The One True God requires we love Him with all of our heart, soul, mind and strength and that we love each other as we love ourselves. In loving this Truth we will seek God, we will obey God and we will manifest the nature of God to others; the nature of love, grace and mercy.
Choosing to reject this Truth is choosing to reject God Who will grant us our desire in the next life too, that is where hell exists, away from God forever with all those who likewise rejected love, grace and mercy so they will live forever in pain and suffering.