Among Karl Barth’s opening general observations about the Doctrine of Reconciliation, he says that God “does not merely give out of His fulness (sic). In His fulness He gives Himself to be with” us and for us. God “gives Himself , and in so doing gives [us] all things.” Giving us “all things” is a good thing, right? Not so fast!
Barth continues: “Even in his experience of what comes to him from God, man can be blind or half-blind, and can therefore make mistakes, and can find terror and destruction in what God has allotted and gives as a supreme benefit. … Even the divine favour will then take on the aspect of wrath. God’s Yes will then become a No and His grace a judgment. The light itself will blind him and plunge him in darkness” (CD IV/1, pp 40f).
In relation to people who reject God, Barth insists that God is not angry, only merciful. “The love of God burns where they are, but as the fire of His wrath which consumes and destroys them. God lives for them, but the life of God can only mean death for those who are His enemies” [from their perspective, not from God’s perspective] (p. 221).
This idea of God’s light being both the warmth of love, the consuming power of divine passion for us, and in contrast, at the same time the consuming power of vengeance is a common theme in the Holy mothers and fathers. God’s mercy could be described as God’s willingness not to shine his love directly upon us (because it would destroy us) but only in veiled form. Once the chaff is gone and we are purified (that is, once we have arrived in heaven), we will be able to endure this shining love, but now it would destroy us.
It is in this sense that the Holy mothers and fathers also claim that heaven and hell are the same place. The conjecture is that all humans enter the identical presence of God after death. For the righteous this presence is love, glory, and light. For the unrighteous it is the consuming fires of hell.
In short, Barth is in full agreement with the ancient church that the wrath of God is a human reaction to God’s presence. Wrath is a negative human interpretation of the fire of God’s love.