Nonbeing is omni-present and produces anxiety even where an immediate threat of death is absent. It stands behind the experience that we are driven, together with everything else, from the past toward the future without a moment of time which does not vanish immediately. It stands behind the insecurity and homelessness of our social and individual existence. It stands behind the attacks on our power of being in body and soul by weakness, disease, and accidents. In all these forms fate actualizes itself, and through them the anxiety of nonbeing takes hold of us. We try to transform the anxiety of nonbeing into fear and to meet courageously the objects in which the threat is embodied. We succeed partly, but somehow we are aware of the fact that it is not these objects with which we struggle that produce the anxiety but the human situation as such. Out of this the question arises: Is there a courage to be, a courage to affirm oneself in spite of the threat against man’s ontic self-affirmation?
~The Courage To Be, 45.