But if you are predestined to go to heaven, why is it necessary to follow God's commnd? Also, if you are predestined to go to heaven, then why do you have to become a Christian in the first place?
BTW, there is not a predestination to hell. It is just that by virtue of not being predestined to salvation, reprobates will continue in their sin.
So, they are predestined to hell, since they are not predestined to salvation.