Thank you for sharing this insightful passage.
Synergy seems to be bottom up manifestation of surprising and engaged energy and what is holding all of it up is unknown to me. And I tend to think of all unknown/unknowable wholesomeness that is experienced as Grace.
As a caretaker for my father who moved on, I found the strength to be present and not sleep for many days simply because I could connect to him. It was not my effort, just like the nurse shares in this passage.