Sometimes when you care too much, you run the risk of falling into tunnel vision.
You care too much, you think too much, you assume too much, and then you stress too much. Both you, and everyone around you.
The brain and the heart each has thoughts of their own.
But the brain, ever rational and logical, will never win against that of the heart. Irrational, impulsive and sometimes downright delusional.
Let your brain have a chance to think.
To make rational decisions.
You might find that it helps you take more care.
As with all things, easier said than done.