There's a difference between interest and commitment. When you're interested in doing something, you do it only when it's convenient. When you're committed to something, you accept no excuses - only results.
The artist must scorn all judgment that is not based on an intelligent observation of character. He must beware of the literary spirit which so often causes a painting to deviate from its true path - the concrete study of nature - to lose itself all too long in intangible speculations.