Christ Suffered and Died........

To show the wealth of God's love and grace for sinners. (reason 5 from John Piper's The Passion of Jesus Christ)

One will scarcely die for a righteous person-
though perhaps for a good person one would dare even to die-
but God shows His love for us in that while we were still sinners,
Christ died for us. Romans 5:7-8

For God so loved the world, that He gave His only Son,
that whoever believes in Him should not perish but have eternal life.
John 3:16

In Him we have redemption through His blood,
the forgiveness of our trespasses, according to the riches of His grace.
Ephesians 1:7