Coleridge is thought provoking.
What is Life?
Resembles Life what once was held of Light,
Too ample in itself for human sight?
An absolute Self—an element ungrounded-
All, that we see, all colours of all shade
By encroach of darkness made?-
Is very life by consciousness unbounded?
And all the thoughts, pains, joys of mortal breath,
A war-embrace of wrestling Life and Death?
Written around 1805.