Penal Substitution is rooted in the character of God as He revealed Himself to Moses in Exodus 34:6-7.
“The LORD, the LORD God, merciful and gracious, longsuffering, and abounding with goodness and truth, keeping mercy for thousands, forgiving iniquity and transgression and sin, by no means clearing the guilty.” Immediately the question arises, how can God be merciful and gracious, how can He forgive iniquity, transgression and sin without clearing the guilty? How can He clear the guilty if He abounds with truth—if He is a
‘just Judge’ (Psalm 7:11)? How can it be said that,
‘Mercy and truth have met together; righteousness and peace have kissed’ unless God can simultaneously punish sin and forgive sinners?
I have argued this case over five or six years on this board and shall not do so again. At one stage I was challenged to present the Biblical case of the Doctrine of Penal Substitution. I posted it on this board, but newcomers may not have read it. I have since put it on my blog. Here it is again.
The Theological and Biblical Basis of Penal Substitution
I was further challenged as to how God the Father could forsake God the Son without 'breaking' the Trinity. Here is my reply to that:
Penal Substitution and the Trinity