There could be no such thing as one not prepared for heaven entering heaven. There is no such thing as a human being sanctified and fitted for the heavenly kingdom not having an election to that kingdom. God elects those who have been working on the plan of addition. The explanation is given in the first chapter of Second Peter. For every human being, Christ has paid the election price. No one need be lost. All have been redeemed. To those who receive Christ as a personal Saviour will be given power to become the sons and daughters of God. An eternal life insurance policy has been provided for all.
Whom God elects, Christ redeems. The Saviour has paid the redemption price for every soul. We are not our own; for we are bought with a price. From the Redeemer, who from the foundation of the world has chosen us, we receive the insurance policy that entitles us to eternal life (Letter 53, 1904).
– S.D.A. Bible Commentary, Vol. 7, pg. 944