Ever wondered where this phrase comes from?

The undiscovered country.

Hamlet Act 3, Scene 1. Read it in context, it’s fantastic. Here is a little: But the dread of something after death, The undiscovered country from whose bourn no traveller returns…
Hamlet is asking who would suffer all the ills of life instead of dying peacefully by their own hand, if there was no fear of what was to come to them after death. We accept the evil we know rather than risk what we don’t know.