Action as we know it, is in reality a reaction, it is an incessantly effort with the purpose of becoming something; that is to say: a denial of, an effort of avoiding what you are.
When you try to avoid what you are, then this is because you confuse the Now´s fact with that problem, which the thinking´s past and future thinks the fact is. This is an unreal condition, a feeling of loss and emptiness, of insufficiency. And that is precisely what you are, the lived despair.
But when you are the emptiness present without choosing, without condemning or justifying, then the understanding of what you are will imply action, and this action is the creative being.
To stop becoming something is to stop accumulating in philosophical sense. Not to accumulate, but to die every day, minutely, is timeless being. The mystics call it a kind of death. The Stoics trained themselves in being present in the Now by philosophizing over the meaning of death in their lives. To philosophize became in that way, in the Stoics, a way of learning how to die. An example of this is the Stoic Horace, the man behind the expression ”Carpe diem!” (Seize the day!).