For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh. Romans 9:3
The most striking and original contribution that Balthasar makes to this discussion, I believe, is his critique of Thomas Aquinas’s view—shared widely in the classical tradition—that part of the joy of heaven is to witness the sufferings of the damned. To this he contrasts the approach of a surprising number of saints and mystics who declared a willingness to suffer on behalf of a denizen of hell or even, at the limit, to take his place as a gesture of love. The prototype here is Saint Paul himself, who says in the ninth chapter of Romans: “I could wish that I myself were accursed and cut off from Chnst for the sake of my brethren, my kinsmen according to the flesh” (Rom 9:3)- The possibility that his fellow Jews might be separated from Christ does not awaken in Paul anything even vaguely resembling gloating self-satisfaction, or even delight in the divine justice, but rather a mercy that conduces to utter self-sacrifice.
From the Foreward (Robert Barron) of Dare We Hope “That All Men Be Saved”? by Has Ur Von Balthasar.