God did not spare His only Son

At the moment when Abraham was to offer his only son, Isaac, as a sacrifice... a substitute ram was provided. (Genesis 22)  Isaac was saved by God's grace.

At the moment when the Father was to offer His only Son, Jesus, as a sacrifice... the Son was not spared.  (Matthew 27:33-56)  We are saved by God's grace.

What a love (1 John 4:10)