Piper’s conclusions are correct! But he’s taken a complex path to get there.
Romans 5:1-11 destroys ANY IDEA THAT GOD SAW MEN’S FAITH and decided to save them. So does Romans 1:18, the gospel is the POWER OF GOD for salvation of men because men CAN’T SAVE THEMSELVES–period!
Now, what does “God forknew (proginōskō”) mean in Rom. 8:29?
This means absolute knowledge before hand. Knowledge of what? Not the actions of the person. That would be EXPERIENCIAL knowledge/learning. God learns nothing, he knows everything!
You (faith-full) Christian, were COMPLETELY purposed by God–every cell of you–BEFORE the creation of the universe began. Your name was written in his (blueprint) book of Life. He planned you like a God plans the world.
Known unto God are all his works from the beginning of the world.–Acts 15:18 KJV
You are one of his works!
For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.–Ephesians 2:10 KJV
Read the rest of what he planned in your life in the rest of Romans 8.