But the Church obviously liked Anselm’s theory most, probably because it felt it has the deepest psychological roots, namely the feeling that a price must be paid if one has become guilty; that we cannot pay it, but that God must pay it. But now the question was: How can man participate? And to this the juristic mind of Anselm had no answer. Here Thomas came in and said: It is the mystical union between head and members, between Christ and the Church, which makes us participate in all the steps which have been (made) by Jesus himself.
Now this is Anselm. Tomorrow, the last hour before Easter, we deal with Abelard – – and two others – -Abelard being Anselm’s great counterpart.
Paul Tillich, A History Of Christian Thought – Table of Contents