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...Although the term Existentialism was invented in the 20th century by the French philosopher Gabriel Marcel, the roots of this thought go back much further in time, so much so, that this subject was mentioned even in the Old Testament. If we take, for example, the Book of Ecclesiastes, especially chapter 5, verses 15-16, we will find a strong existential sentiment there which declares, 'This too is a grievous evil: As everyone comes, so they depart, and what do they gain, since they toil for the wind?' The aforementioned book was so controversial that in the distant past there were whole disputes over whether it should be included in the Bible. But if nothing else, this book proves that Existential Thought has always had its place in the centre of human life. However, if we consider recent Existentialism, we can see it was the French philosopher Jean-Paul Sartre who launched this movement, particularly with his book Being and Nothingness, in 1943. Nevertheless, Sartre's thought was not a new one in philosophy. In fact, it goes back three hundred years and was first uttered by the French philosopher René Descartes in his 1637 Discours de la Méthode, where he asserts, 'I think, therefore I am' . It was on this Cartesian model of the isolated ego-self that Sartre built his existential consciousness, because for him, Man was brought into this world for no apparent reason and so it cannot be expected that he understand such a piece of absurdity rationally.''
'' Sir, what can you tell us about what Sartre thought regarding the unconscious mind in this respect, please?'' a charming female student sitting in the front row asked, listening keenly to every word he had to say.
''Yes, good question. Going back to Sartre's Being and Nothingness it can be seen that this philosopher shares many ideological concepts with the Neo-Freudian psychoanalysts but at the same time, Sartre was diametrically opposed to one of the fundamental foundations of psychology, which is the human unconscious. This is precisely because if Sartre were to accept the unconscious, the same subject would end up dissolving his entire thesis which revolved around what he understood as being the liberty of Man. This stems from the fact that according to Sartre, if a person accepts the unconscious mind he is also admitting that he can never be free in his choices since these choices are already pre-established inside of him. Therefore, what can clearly be seen in this argument is the fact that apparently, Sartre had no idea about how physics, especially Quantum Mechanics works, even though it was widely known in his time as seen in such works as Heisenberg's The Uncertainty Principle, where science confirmed that first of all, everything is interconnected - the direct opposite of Sartrean existential isolation - and second, that at the subatomic level, everything is undetermined and so there is nothing that is pre-established; all scientific facts that in themselves disprove the Existential Ontology of Sartre and Existentialism itself...
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