Forget The Numbers

I recently watched a clip by Geoff Boyle, talking about cinematography on Cooke Optics TV. I figured that it could be useful to share. 
This topic hit home for me because my upbringing was in art. Painting and drawing were my home for most of my life. 
Coming into cinematography I see the same thing.  You can forget the numbers at a point and just focus on painting the image. Make it look right. Forget the numbers and paint.  Does it look right? Are the colours right? Does it feel right? Can you understand what's happening in the context of the story? Are your eyes guided in the right place? Good. You're done.