and21
Since I am not an existentialist, the philosophy itself doesn't diminish my personal optimistic viewpoint. But some of the tenets that you have outlined are very common in all people's lives.
all your actions are based on uncertain knowledge
This is always true; nothing in life is ever guaranteed. You must make choices based on what you think is best and go from there. If we always knew what life was going to bring us, it would be fairly boring and unchallenging.
the only meaning which exists is subjective.
Again this is true for most people. Morality is subjective: what I consider is right is not necessarily what you consider is right. A society may form a consensus of what the members in general consider moral and transform those "shared" beliefs into laws. But not everyone in the society may believe that the laws valid. For example in this country some people believe in unrestricted abortion, others believe in no abortion, and others believe in something in between. The moral question is when is abortion the killing of anoher human being? There is NO specific answer to that question, so laws are enacted based on what appears to be the consensus opinion.
Other societies have different moral standards that are hard for outsiders to understand: honor killing, female circumcision, polygamy, animal sacrifice, etc. Whether I agree with these or not, they are valid for the groups and individuals that embrace these views. I don't know that I have the right to impose my views on another, but by the same case, I don't have to accept these values as my own just because someone else believes them. It is for me to decide based on my subjective and objective beliefs.
BTW, existentialism itself is full of contradictions and ambiguity. It is what in its essence it expounds: subject to personal interpretation.
Do you consider yourself an existentialist? Just curious. If you are you can find it in many of the early writers of the 20th century. I took a course in college covering the writings but found the literature extremely dark and depressing. A part of life, I know, but not necessarily the part I like to dwell on.
Best wishes,
N.