Hello Whatever ... are you implying that God doesn't know everyone already? Isn't it intuitively clear that if Paul was merely saying "God predestined everyone He knew," then he could just as easily have said, "God predestined everyone"?
All of Scripture is a single context. Who are we told will be made in the likeness of Christ? Those who believe. (e.g., John 1:12 -- note that believing preceeds the blessing) Paul isn't telling us a new thing in Ephesians 1 or Romans 8, and there's no reason to believe that it's out of context with the balance of Scripture.
Hi Gina ... Of course it matters. But knowing something doesn't mean causing it. If I'm standing 20 feet from an apple tree and see an apple fall, I know it's going to hit the ground. That doesn't mean I had to cause it to hit the ground. It just means I could see the result before it happened.
If, then, I say, "Those apples that hit the ground, I will make into apple sauce," my making apple sauce is not the reason the apple hit the ground.
God knows all past, present, and future, because He is not constrained by time, which is part of His creation. Therefore, He knows all that will happen because it is already before Him, plain to His view ... not because He directly caused all of it. (It is against God's nature to be responsible for sin, no matter how one wants to talk circles around that issue. Nor would He beg a person to come to Him if it were not possible for that person to do so. And it would make no sense for Him to plead with someone to believe if that person can only believe by God's sovereign will.)
God's foreknowledge is not the same as saying we don't have choice, but rather it is saying that our choices are known to God even before they are known to us.
1 Peter 3:9 tells us that God isn't willing that anyone should perish. Matthew Henry's Commentary (Calvinist) tells us that this refers only to the elect, and that He is waiting patiently for the elect to come to Him. If so, and if He is sovereign, and if He alone can cause someone to come to Him, then doesn't this tell us that He's waiting patiently for Himself to do something?
John 3:16 tells us that He so loved the world that He gave His only son, etc., placing the act of believing before the granting of eternal life. It doesn't say anything about God so loving a fraction of the world that He gave His son as a ransom for the predestined elect, who have no choice whatsoever. (cp. John 3:17)
In fact, there is not a single passage in the Bible that says that a person is born predestined for Hell and can't choose Heaven. Not one such verse. However, there are scores of verses that speak of God's longsuffering patience, of His pleading with people to turn to Him, of people harding their hearts against Him, and of others turning to Him. This is not a God who creates people merely for the purpose of condemning and destroying them "for His good pleasure."