Here are 2 theories to Existentialism; both diametrically opposite and both equally true.
1. The unexplored life isn't worth living
2. What you don't know can't hurt you.
There is a 3rd greater theory.. my "Mother of all theories" which simply states...
Everything you know, all you believe in, and you.... the sum total of your Existence could all be shit. The Force is sitting up there somewhere, laughing his head off and saying, "You ain't seen nothing yet."
We now return you to regular programming on your planet.