It’s not, I think, unwarranted to ponder the fellowship of the Trinity, and the Father and the Son conceiving (no coercion whatsoever) a plan whereby the Father consults with the Son of His willingness, and the Son consults with the Father of His intention, and a most magnificent agreement is reached: that the Son will, after the universe is created and has fallen, and after God has shown everything He wants to show about His holy self through 2000 years of Jewish history, then the Son would enter and die. That was the plan.
Again, Paul says in 2 Timothy 1:9: “God called us to a holy calling, not because of our works but because of His own purpose and grace, which He gave us in Christ Jesus before the ages began.” So, before the ages of time began, the plan was for the revelation of the glory of the grace of God specifically through Christ Jesus.
SEPTEMBER 22, 2012
—John Piper, “Why Did God Create the World? John Piper” (sermon: September 22, 2012) https://www.desiringgod.org/messages/why-did-god-create-the-world