The purpose of the physical subject is to evoke feeling and to create the spark to start a painting. Evoking themes are often: pureness or (unshrouded) state of being, truth, freedom, integrity, compassionate acceptance, true colors, in search of Anima or the spirit and mostly: being close to this unveiled vulnerability.
The object or person painted is surprisingly never the subject. What the painting evokes in the viewer is the true subject. The painting is executed in such a way that the immaterial perception is undoubtedly present, although it is not actually painted. The goal is not to depict the thing, but the experience of it.