This term also means "spectator". This is how our language is conceived; we must never forget it.

The one who witnesses a thing, whatever it may be, who sees it with the eyes of the body or with those of the mind.

This is how the Littré dictionary defines it. And to continue:

He or she who watches, observes without acting.

I write, I play, I stage both for and against him, her, the spectator. To be his mirror, mine through his eyes.