The art of knowing is knowing what to ignore, this also means to me what not to focus on or what not to think about.
Selective memory can refer to an individual's tendency to only remember certain information while forgetting the rest.
That's a valuable perspective. It ties into the idea of selective attention—focusing on what truly matters and letting go of distractions or thoughts that don't serve your well-being. Knowing what to ignore can be just as important as knowing what to pay attention to.