"I pray for them: I pray not for the world, but for them which thou hast given me; for they are thine. " -- John 17:9
The fact is that the predestination is not even dealing with salvation but with eternal security, that the believer, being seen in Christ, IS predestinated to be conformed to the image of Christ (ultimate glorification).
Now the reason for this is Predestination is a preforeseen faith, which puts the believer into Christ(Eph.1:4).
This is all New Testament doctrine, not occuring in the Old Testament.
The Calvinists make Sovereignity the dominate attribute of God, ignoring all others (love, wisdom etc), when in fact, God's sovereignity is not even an attribute, but the result of His other attributes.
The dominate attributes of God's essence is Holiness which cannot be compromised, and Love, which motivates everything God does, including judgement on sin.