Drawing is not following a line on the model, it is drawing your sense of the thing.
No work of Art is really ever finished. They only stop at good places.
Whatever you feel or think your exact state at the exact moment of your brush touching the canvas is in some way registered in that stroke.
Paint what you feel. Paint what you see. Paint what is real to you.
Everything depends on the attitude of the artist toward his subject. It is essential.
There is weakness in pretending to know more than you know or in stating less than you know.