What the eye doesn't see, the heart doesn't grieve over

What the eye doesn't see, the heart doesn't grieve over.

Prov. You cannot be upset by something you do not know about. When Robbie cracked his mother's favorite vase, he simply turned the cracked side toward the wall. "What the eye doesn't see, the heart doesn't grieve over," he thought.
See also: eye, grieve, heart