If a person sees himself or herself as indefinable, it is true. In the beginning he was nothing, and he will not be anything until later. Later he will be what he makes of himself. "Thus, there is no human nature, because there is no God to have a conception of it. Man simply is. Not that he is simply what he conceives himself to be, but he is what he wills and as he conceives himself after already existing - as he wills to be after that leap towards existence.
             Man is nothing else but that which he makes of himself"
             Sartre is suggesting that people are responsible for themselves as they are and places entire responsibility for their existence upon them.
             Humans must now decide how to behave. Humans can only call themselves humans if they are acting like humans. They have the ability to act like animals, but it is the ability to think and feel and the choice to use these human qualities that will in turn define them as human. Therefore every person has the responsibility to realize they are human and the responsibility to define by choice who they are. Once humans have achieved awareness of self and their needs, they can begin climbing John Maslows hierarchy of needs beyond food and shelter, and can begin making choices using thinking and feeling. These conscious decisions begin to take place after making oneself who they are. A person must choose who he wants to be before continuing through life. Therefore the first effect of Sartre's existentialism is that it puts people responsible for themselves as they are, and places the entire responsibility for their existence squarely upon every individual's shoulders.
             Once man realizes he is, he is soon faced with the concept of choice. When it is said that people are responsible only for their own selves, Sartre did not mean they are responsible only
             for their own individuality, but that each
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