Freedom is Sartre's most emphasized philosophical concept. The idea of freedom he
advocates premises the philosophical proposition of“ Being before essence” ,with Freedom of
Choice“ as its considerably operationally characterized core.Itis a kind of subjective idealism,so it
is destined to be solitary. Therefore,on the threshold of the mew century,we should reject the
dross and assimilate the essence by means of Marxism,(so that we can contruet new philosophical
ideas adapting to the mew human essence of the day)”.