If you ever come to a point where instead you feel as if you know something about everything, that is when you should be worried. A favorite saying I encounter

If you ever come to a point where instead you feel as if you know something about everything, that is when you should be worried. A favorite saying I encountered during grad school: <after finishing undergrad>: "I know everything!" <after finishing Master's>: "I know nothing..." <after finishing PhD>: "Nobody knows anything."