No picture can be good which deceives by its imitation, for the very reason that nothing can be beautiful which is not true.
John RuskinThe man who can see all gray, and red, and purples in a peach, will paint the peach rightly round, and rightly altogether. But the man who has only studied its roundness may not see its purples and grays, and if he does not will never get it to look like a peach; so that great power over color is always a sign of large general art-intellect.
John RuskinAbsolute ugliness is admitted as rarely as perfect beauty; but degrees of it more or less distinct are associated with whatever has the nature of death and sin, just as beauty is associated with what has the nature of virtue and of life.
John Ruskin