The nothingness in being

What is the real essence of existence? or is that a myth by virtue of which we can assign a meaning to all our lives? According to renowned french philosopher Jean Paul Sartre,"existence precedes essence" means that first of all we exist here and the purpose follows even though there is no particular purposes. This is the spinal cord statement of existentialism. According to this we all are born here with empty possessions,we all are our choices and we have the complete freedom on us such that no one is supposed to rule over you .You are ultimately your choice. Sartre has defined freedom as a permanent structure of the human being and has claimed that anguish manifests freedom.It is an antagonistic statement for the philosophy of determinism,which states that every event would be rigidly caused by an earlier event,in turn caused by an earlier event ,and so on to infinity.For a determinist there is a continuity of strict casuality between the present and future,and hence freedom is impossible for a determinist. According to Sigmund freud, an event in my childhood whose memory is locked in my unconsciousness can cause my neurotic behavior as an adult.Sartre denies all these being for itself is separated from its past by a nothingness. It is time that the past has factity. That is there are facts in the past that obviously can not change.But substituting the past with an entity called nothingness is freedom.