What does 'awareness of the flow' mean

What is the meaning of *'awareness of the flow'*? Does that mean awareness of the continuous flow of arising and passing away of all conditioned things? The phrase is mentioned on several occasions by Stephen Levine in '_A Gradual Awakening_' (which is a book in which the author "writes about his experiences with and insights into vipassana meditation"); for instance at p. 39: > By gently letting go of everything—not through force, not by slaying it, but simply seeing all the content as passing show, as process and flow—we become the whole of our experience and open to our natural understanding. Another example p. 57: > We can observe [with our practice] what anger feels like, what joy feels like, what separation from the flow feels like, what fear or worry feels like. Last example p. 58: > [Hindrances] distract us from an even-minded awareness of the flow.