The fact that not all receive the gospel is not due to the impotence of God, who could readily make all creatures submit to his empire. Secondly, that some arrive at faith, while others remain stupefied and obstinate, is due to his free election. Therefore, He has not predestined any men to be lost. Therefore, He has not predestined anyone to perish. We can either obey or disobey God.
Christians can sin willfully.
Christians have a free will. God has not predetermined who will be saved and who will be lost taking away man's free will in respect to sin. Christians are not predestined to salvation. The person who sins will die. The person who turns from sin will live.