The mystery of existence will ever loom beyond the bourne of man's intellect.
Hamlet describes non-existence as "that undiscover'd country from whose bourn no traveller returns".
Event horizons mark the bourne from which no traveller, even light, can return, because of the intense gravity.
Setting forth in an opposite direction, he should get to the same bourne by another route.
The vessel moved through the fog towards some unseen bourne.
