I think that a work of art should not only be careful and sincere, but
that the care and sincerity should also be evident. No ugly smears
should be allowed to do duty for the swiftness which comes from long
practice, or to find excuse in the necessity which the accomplished
artist feels to speak distinctly. That necessity must never receive
impulse from a desire to produce an effect on the walls of a gallery:
there is much danger of this working _un_consciously in the accomplished
artist, _consciously_ in the student.
_Watts._