Two core feelings that existentialism addresses are anguish and despair. In the context of existentialism, anguish is considered to be the negative feelings that we develop (such as having stress or anxiety about a decision) are direct results of the state of freedom that we exist in according to Sartre. Because we must take responsibility for our actions, a certain level of anguish arises when contemplating the fact that you’ll have some level of culpability attached to the results of decisions you make. Existentialism takes the stance that existence precedes essence, or to put it more simply, the essence of an action or person or thing cannot be understood until it exists because there was no like image for the essence to be derived from. So, people are defined by their actions because their actions create the essence of who they are, making each person individually responsible for how they act and who they are. Each action sets a precedent for future action, as we begin to use our essence as a precedent for action once it is developed. When a person acts in a way that defines who they are and choose what they believe is to be the best course of action, they further solidify that essence and create a certain image of humankind that will be looked upon by humans of the future. This breeds greater feelings of anguish due to the responsibility of creating a lasting image of man.
Despair arises from that which is out of our control, and that we can only rely on that which we know to be true from our own action. Sartre argues against inaction still, because we are defined by our actions as much as our inaction, or that which results of our inaction. With time and understanding the essence of other individuals and things, we can rely on them if we know that they have made themselves to be reliable or good, but we cannot assign this same trust to everyone/thing because, if existence comes before essence, there is no foundation of goodness that we can reasonably believe exists in all things, only that we can reasonably believe in things where we are familiar with their essence.
“When we say that man chooses himself, we do mean that every one of us must choose himself; but by that we also mean that in choosing for himself he chooses for all men. For in effect, of all the actions a man may take in order to create himself as he wills to be, there is not one which is not creative, at the same time, of an image of man such as he believes he ought to be. To choose between this or that is at the same time to affirm the value of that which is chosen; for we are unable ever to choose the worse.” -J.P. Sartre
https://thinkingbeings.files.wordpress.com/2015/08/sartre.pdf (p.3 par.1)
Sartre explains here that we do what we believe we ought to do as the best reaction. When the same choice is made over and over, it creates a norm in regards to it that others will then use for guidance in their actions, further perpetuating this as the norm. In regards to individual marriage, this has contributed to the norm of human monogamy. The first person to marry created something to be replicated and with each replication, further solidified the normalcy of it. Because monogamy is essential to marriage, each person who marries further normalizes this for all of humanity, therefore committing future generations to replicating this and in turn, committing monogamy to all of humanity.
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