Here is a lovely thought from Constantin Stanislavski on the artist's duty to cultivate a warm inner posture in observing the world:
"A true artist is inspired by everything that takes place around him; life excites him and becomes the object of his study and his passion; he eagerly observes all he sees and tries to imprint on his memory not as a statistician, but as an artist, not only in his notebook, but also in his heart. It is, in short, impossible to work in art in a detached way. We must possess a certain degree of inner warmth; we must have sensuous attention. That does not mean, however, that we must renounce our reason, for it is possible to reason warmly, and not coldly."