It is in the contrast of light and dark that design happens.
You can't get it right, until you make it wrong.
It's not what you paint. It's how you paint it. You don't have to paint elaborate things. Paint simple things as beautifully as you can.
See it in terms of paint. We don't learn subject matter, we learn paint. The musician can play any score that is set before him.
If it's all wrong, it's all right.
Gray is the queen of colors, because she makes everyone else look good.