Here are some striking statements by Karl Rahner. They can be found in The Great Church Year, pp.204,205 or in The Eternal Year. There are some pretty dramatic problems with Rahner, some of which may be documented in time to come on this blog, but the critique of pantheism below is very good.
And so my faith and my consolation are centered on this: that he has taken with him everything that is ours. He has ascended and he sits at the right hand of the Father. �I see the Son of man standing at the right hand of God.� The absolute Logos shall look at me in eternity with the face of a man. Those who theorize on the beatific vision forget this. As yet, I have read nothing about this in any modern tract in dogma. How strange! At this point pious ascetics read into the silence of the theologians some sentimental anthropomorphism about joy. And what is more they even dare�on their way to the beatific vision�to bypass the humanity of Jesus. As though we can do this so casually! Whoever �imagines� things this way obviously is not sufficiently aware that God’s revelation was a man.
Jesus has taken with him what he was, and what we are, to such an extent that he himself, Jesus of Nazareth, abides forever. We must be more important than we thought, of more permanent value and of more substance when we consider that this is feasible in spite of our foolish or despairing pride. One could reduce all Christianity to this one formula: it is the faith in which God so surpassed the pride of human beings that the person’s grossest imaginings of his own worth are degraded to sinful disbelief and almost brutish timidity.
Moreover when one indulges in pantheistic imaginings about God’s existence, on closer inspection one certainly does not make oneself into God, but rather God into oneself. Pantheism is no objection against what has been said above, for what does the incarnation, what does grace and glory mean except that the human person can endure in the midst of God, in the midst of this absolute fire, in the midst of this incomprehensibility. He or she can endure directly before one who is so exalted above everything that is outside of him that it is simply inexpressible. This is, nevertheless, the most unlikely truth. And it is celebrated in Christ’s ascension. For in his ascension this truth has been definitively realized.
In the first paragraph it seems very likely that Rahner was following Leo the Great.