Surface attention is glancing and immediately abandoning what we just gave our attention to and going into thoughts about it. Glancing is very casual, very disrespectful to your environment, your world, your mind. Deep attention would be looking and not abandoning. Don’t abandon the blackness of black. See redness of red without going into about red. It won’t get deep unless you stay with the surface.

https://www.youtube.com/watch?v=ECgi2dBNntw