Here is a list of blog posts dealing with the foundations of medical substitutionary atonement in Scripture, and supports from church history which always include analyses of Scripture. For a list of blog posts about the implications of your understanding of the atonement, see Atonement & Ministry. For practical training on how to share Jesus, see Sharing Jesus.
The Suffering Servant of Isaiah 53
Temple Sacrifices and a Bloodthirsty God?
Circumcision as Atonement
Athanasius, the Trinity, and the Nicene Creed
‘My God, My God, Why Have You Forsaken Me?’
Human Being, Human Becoming:
Exploring Human Nature and Human Personhood