There is always a window of time within which one must act if one is to act authentically.  Something takes place, something that disrupts the ordinary state of things, and a response is called for - before one has had time to rationalize, because rationalizing would lead to a conclusion that sustains the ordinary state of things - putting off the the act until a new day and justifying this choice.  The difference between following through with such an act (without authorization from any person or system) and not doing so is extremely palpable and concrete -  the former leans towards the transcendental and the latter leads towards the hyperborean.   Which is to say - the Act opens up the possibility of a Scene, a Stage and a Motive