"I therefore advise you not to put too many lights and shadows together, but to arrange them cleverly in groups. Allow your brightest lights subtly flow into the not so bright lights. I can assure you that they will light up all the more. Always surround your deepest and darkest areas with a clear brown, this way they will allow the light to brighten in strength and intensity. Rembrandt has used this virtue to great effect and he was expert in bringing together related colours."