From Ratzinger, "On the Theological Basis of Prayer and Liturgy":
...there is a objection...to a God of revelation. This was already formulated in the philosophy of the ancients, but it has acquired greater force in the modern scientific and technological world. It can be put like this: a rationally constructed world is determined by rationally perceived causality. To such a scheme the notion of personal intervention is both mythical and repugnant. But if this approach is adopted, it must be followed consistently, for what applies to God applies equally to man. If there is only one kind of causality, man, too, as a person is excluded and reduced to an element in mechanical causality, in the realm of necessity; freedom, too, in this case is a mythical idea. In this sense it can be said that the personalities of God and man cannot be separated. If personality is not a possibility, that is, not present, in the "ground" of reality, it is not possible at all. Either freedom is a possibility inherent in the ground of reality or it does exist.