The Great White Throne judgment is God’s final judgment. Every human being that ever lived will stand before God to be judged (Revelation 20:11-15, 21:8). What will you do or say? Whosoever was not found written in the book of life was cast into the lake of fire which is the second death.
The first death is when we physically die. The second death is eternal in the lake of fire separated from God forever. The only way to ensure that you do not have eternal death is to believe in Jesus for eternal life. This is God’s heart!
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. (John 3:16)
But what saith it? The word is nigh thee, [even] in thy mouth, and in thy heart: that is, the word of faith, which we preach; That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. (Romans 10:8-9)