When you listen to a rock band play, you can tell if they are perfectly in tune and in sync.
When you eat a dish, you can tell if the ingredients are fresh and if the flavours are in the right proportion.
When you drive a car, in the first 10 minutes you can tell whether it is well made and well maintained.
Our minds and bodies are built with an intuitive understanding of quality. Honing this intuition helps us move towards excellence.