God's Word reveals the personality, fall, and program of Satan, the leader of the fallen angels. His future confinement is in the Lake of Fire with all fallen angels and unbelieving humans. Man is neither inherently good nor able to merit eternal salvation. There is nothing in Adam's fallen descendants with which God can be pleased. He has sinned and falls short of the glory of God.
Scripture reveals two clear and indisputable lines of evidence.
Salvation is the gift of God, brought to men by grace and received by personal faith in the Lord Jesus Christ, whose precious blood was shed for the forgiveness of our sins. God does not overrule man's volition in accepting or rejecting His provision of salvation. Man appropriates salvation by the sole means of faith alone in Christ alone, whose death and resurrection are the ground of man's salvation. He does, however, discipline an erring son as a beloved child when necessary. Salvation once possessed cannot be lost.