As an artist - especially a portrait artist - you have to become very familiar with the human skull. It is the foundation of the face. If you are ever going to accurately capture someone& likeness, you need to understand what lies beneath their skin.
violence has changed me. / My body has grown cold like the stripped fields; / now there is only my mind, cautious and wary, / with the sense it is being tested. — Louise Glück, from “October,” Averno: Poems