Introduction To Christianity - pg. 171

For we have found that the being of Christ
("incarnation" theology!) is actualitas, stepping
beyond and out of oneself, the exodus of departure from
self; it is not a being that rests in itself, but the act of being
sent, of being son, of serving. Conversely, this "doing" is not
just "doing" but "being"; it reaches down into the depths
of being and coincides with it. This being is exodus, transformation.
So at this point a properly understood theology of being
and of the incarnation must pass over into the theology
of the cross and become one with it; conversely, a theology
of the cross that gives its full measure must pass over into the
theology of the Son and of being.