Existence Before Essence. We live, we experience, rather than just be. Every existence is unique; we have no universal humanity, but must create ourselves individually through experiencing the world. We are not human except through what we do. We are not human (essence) until we act (existence). Sartre distinguishes between “being for-itself” (pour soi—people with consciousness, action, and purpose) and “being in-itself” (en soi—the lumpy existence dependent upon others).
Absurdity. 1) Our ability to reason as humans is flawed, and 2) There are elements of the world which reason and logic cannot explain. We are often governed by emotion and desire, anxiety, guilt, and a will for power, for instance. D. H. Lawrence writes, “The soul of man is dark, vast forest, with wild life in it.”
Alienation. The elevation of reason (as in science) artificially separates us from the real world. We are alienated from 1) God (spiritual abandonment), 2) nature (technology builds walls), 3) other men (helplessness before an absurd society), and 4) our own selves (powerlessness to see a complete picture of our selves).
Angst / Fear and Trembling. We have a general dread of the future (“When will I blow up?) but also an anxiety in accepting responsibility for making moral choices (“the anguish of Abraham”). Sometimes we must make decisions which are exceptions to the general, universal, moral law, for we are unique individuals which cannot be held beneath them. Can we accept our separation from the world?
The Encounter with Nothingness. Separated from everything, we stand on a catastrophic precipice of emptiness, the Void. Kierkegaard calls this the “Sickness Unto Death.” There is nothing upon which we may ever rely, even accept.
Freedom / Human Will. For the atheist existentialists, we are condemned to freedom—we are nothing more than what we do, and we individually are the only ones who can demonstrate our existence. We are creatures of will. For those of faith, the commitment of choice is to surpass the alienation from God—faith is a commitment to sacrifice one’s own will and being to God’s will.