Circle of Competence
Our job really is to focus on things that we can know that make a difference. If something can’t make a difference or if we can’t know it, then we write it off. - Warren Buffett
I’ve learned the perimeter of my circle of competence. If you name almost any big company in the US, I can tell you in five seconds whether or not it is within my circle of competence, and if it is I’ve probably got some sort of fix on it. - Warren Buffett