In contrast to the redeemed, the Lake of Fire is the sentence for the reprobate, the unredeemed who are not chosen for grace. The final words in Revelation 21:8 (WEB) say,
But for the cowardly, unbelieving, sinners, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death.
Review the list of those sentenced to the Lake of Fire. The Lord's judgment will be certain and swift. He will not punish anyone unjustly, but instead it is the unredeemed wicked who will be damned. Those who pretend to believe should not think that they will escape while they are also cowardly, vile, murdering, and sexually immoral... if their sins are not redeemed. Those who are brave and pure, yet who reject the grace of Jesus Christ through their unbelief and false gospels will not escape... if their sins are not redeemed. Those outside of Christ will be placed into the blast furnace of God's wrath for The Ages of The Ages.
There will be no escape from this judgment for the unredeemed.
However, those chosen by Jesus Christ for grace, those sinners hidden safely inside of Christ, are secure in the Father's love. They are commanded to repent and turn away from wickedness as we read in 2 Timothy 2:19 (WEB),
However God’s firm foundation stands, having this seal, 'The Lord knows those who are his,' and, 'Let every one who names the name of the Lord depart from unrighteousness.'
Are you loved by the Lord? Do you want to have no doubt that you have been chosen by Christ from before the foundation of the world? Look to Jesus Christ and his cross for the proof. Belief cannot add your name to his Book of Life, but with eyes open to the cross you can know that God has always loved you and will always love you! With the eyes of faith open you can see your name inked in the Lamb's Book of Life from before the creation of the World. Are you a descendant of Adam? The second Adam has redeemed you! Confess his name and strive to please your lover!