Push Out refers to a boat image, launching something into the sea,. It us the start of a journey and there needs to be a deliberate action of stretch to get things moving. So it is with life, not much happens when you don’t start it yourself. The odd things do happen to you, but I think mostly in response to what you yourself make go. Life does not stop if you do, but I think it levels to a kind of numbness. Suppose passion involves activity energy converted to doing something concrete.
The birds/butterflies I suppose can be then understood to be transformative processes, for when you do something things change, the action changes your perceptions or understandings both of yourself and the world.