Angst & Dread 

1.  The fear of existence.
2.  The fear of nothing.

Being and Time by Martin Heidegger 

Anticipation reveals to Dasein its lostness in the they-self, and brings it face to face with the possibility of being itself, primarily unsupported by concernful solicitude, but of being itself, rather in an impassioned freedom towards death -- a freedom which has been released from the Illusions of the "they", and which is factical, certain of itself, and anxious. (Read More)

Existence and Existents by Emmanuel Levinas