There should be no argument in regard to morality in art. There is no morality in nature.
Nothing is a waste of time if you use the experience wisely.
What is drawing? Not once in describing the shape of the mass did I shift my eyes from the model. Why? Because I wanted to be sure that nothing evaded my grasp of it... My objective is to test to what extent my hands already feel what my eyes see.
What is commonly called ugliness in nature can in art become full of beauty.
Patience is also a form of action.
One must work, nothing but work, and one must have patience.