In the artist there is not only, as has been previously reported, projection and introjection of the body image into space, but also onto the canvas of a painting (and into a character in literature). The canvas is thus said to represent the body image of the artist and, sometimes, his skin. Libidinal and aggressive energies are carried to the canvas by the hand, as in infancy (Hoffer) they are carried from the mouth to the skin. Rose maintains that, in scientific and artistic work, thought and action—including kinesthetic reactions—are in an essential oscillating, reciprocal, equilibrial interchange.