-- Karl Rahner, S.J. (1904-1984), as quoted in an article today at Commonweal
"For a Christian, his Christian existence is ultimately the totality of his existence. This totality opens out in the dark abyss of the wilderness which we call God. When one undertakes something like this, he stands before the great thinkers, the saints, and finally Jesus Christ. The abyss of existence opens up in front of him. He knows that he has not thought enough, has not loved enough, has not suffered enough."
The Easter Vigil image above is from here.