The basic tenet of existentialism is the each person is responsible for giving meaning to their life. Which is something I agree with -- I have not studied philosophy -- it is a general concept I hold. Much the same as what you read in my work, may not be what I wrote, but I cannot tell you how to interpret my words.
The reason for this deep post today is I was asked by a Romanian philosopher to add him to my contacts on LinkedIn. I must admit, I am as honoured as I am amazed, because I never considered myself much of a student of philosophy.
As a writer, I like to read a variety of subjects and at various times I have considered reading Jean Paul Sartre. I like to vary my reading as much as possible -- you never what topic you can find -- which can lead to a story.
There is an interesting section of Sartre's life, in the late 1960s he attacked the work of Marcel Proust. The reason was Proust's reputation had risen above Andre' Gide's, and Gide was Sartre's mentor.