Where does it say in the Bible that salvation is predestined?
Notice in verse 28 Paul wrote, "who have been called according to His purpose." The Greek word for 'called' is 'kletos'. It means to be called, invited; called to privileges or functions. Notice that all those who God foreknew, He also predestined, called, justified, and also glorified. That is why it is called the 'Golden Chain of Redemption", as they all are linked together. Now, in regards to those He 'foreknew', that Greek word is 'proginosko' and it is a verb, which means that God does not merely know who will be willing to be saved, and He elected them on that basis. It means that He is active in foreknowing them, as a verb is a word that expresses action, the subject of the verb(God) doing something. Whom He foreknew, He predestined, called, justified, and glorified. He did not foreknow ppl's actions, i.e., those who would be willing to be saved, but He foreknew THEM, the WHOM HE FOREKNEW.