Actresses can get outrageously precious about the way they look. That's not what life's about. If you starve yourself to the point where your brain cells shrivel you will never do good work. And if you're overly conscious of your arms flapping in the wind how can you look the other actor in the eye to respond to them?
You shall always find what you created in your mind for instance a benevolent God or an evil Devil. Between them are countless facets. Therefore concentrate on the depth of your consciousness and on what you consider to be positive and good.