Time.

A finite extent or stretch of continued existence, as the interval separating two successive events or actions, or the period during which an action, condition, or state continues; a finite portion of time (in its infinite sense).

It was a long time since Henry had worked on the play, and he was impatient for rehearsals to begin.
— D. Lodge Author, Author

For the actor, time, along with space, always has to be considered. It’s in all our work in every shape and form. Maybe Time is the ultimate answer to all things.