This warning sign, posted at the boat launch ramp of Lake Garrison warns boaters to clean their boats before and after they use the lake to fish or recreate. Not all species are harmful; not all species are benevolent. We just don't want to mix unlikely companions, muddiing the waters, complicating the diet of the native species.
Lake Garrison is in recovery. So are the dunes separating the lake from the Pacific Ocean. People are warned to respect the recovery system and give the process time to recouperate.
This is true in our own lives. When we get sick, it is because of some unusual species/bug/virus attaching itself to our boat/body. We were careful most of the time, good hygiene and good rest. But, something else can occur without our knowledge. Perhaps, we didn't pay attention to the warning signs; perhaps we were too bold and too spirited to even notice those signs.
When things are compromised, then we have to retreat our steps and review the protocols for good health. We may have to install new protocols. We should learn from these experiences and avoid the mistakes in the future.
As I go through my physical therapy exercises, counting each repetition, careful to imitate perfectly each movement, I'm eager to get the use of my arm back to normal. It will take time; it will need patience and support; it will involve time and energy and the cooperation of everybody else in my ecosystem.