The anchor of meaning resides in an abyss, deeper than the reach of despair. Yet the abyss is not not infinite; its bottom may suddenly be discovered within the confines of a human heart or under the debris of might doubts.
This may be the vocation of man: to say "Amen" to being and to the Author of being; to live in defiance of absurdity, notwithstanding futility and defeat; to attain faith in God even in spite of God.

Ch. 4. - Who Is Man? (1965)