Equus

You will, however, be without pain.   More or less completely without pain.

And now for me it never stops: that voice of Equus out of the cave: ‘Why Me?   Why Me?   Account for Me!’   All right—I surrender!   I say it!   In an ultimate sense I cannot know what I do in this place—yet I do ultimate things.   Essentially I cannot know what I do—yet I do essential things.   Irreversible, terminal things.   I stand in the dark with a pick in my hand, striking at heads!