You have to first experience what you want to express

To paint nature you must be in it a long time.

The victory one would gain after a whole life of work and effort is better than one that is gained sooner.

The thing has already taken form in my mind before I start it. The first attempts are absolutely unbearable. I say this because I want you to know that if you see something worthwhile in what I am doing, it is not by accident but because of real direction and purpose.

Fortunately for me, I know well enough what I want, and am basically utterly indifferent to the criticism that I work to hurriedly. In answer to that, I have done some things even more hurriedly theses last few days.

As practice makes perfect, I cannot but make progress; each drawing one makes, each study one paints, is a step forward.

Paintings have a life of their own that derives from the painter's soul.