Distinction between the painter's intellectual power and technical knowledge.

In the 15th Lecture of Sir Joshua Reynolds, incidental notice is taken of the distinction between those excellences in the painter which belong to him as such, and those which belong to him in common with all men of intellect, the general and exalted powers of which art is the evidence and expression, not the subject. But the distinction is not there dwelt upon as it should be, for it is owing to the slight attention ordinarily paid to it, that criticism is open to every form of coxcombry, and liable to every phase of error. It is a distinction on which depend all sound judgment of the rank of the artist, and all just appreciation of the dignity of art.

Painting, as such, is nothing more than language

Painting, or art generally, as such, with all its technicalities difficulties, and particular ends, is nothing but vehicle of thought, but by itself nothing. He who has learned what is commonly considered the whole art of painting, that is, the art of representing any natural object faithfully, has as yet only learned the language by which his thoughts are to be expressed. He has done just as much towards being that which we ought to respect as a great painter, as a man who has learnt how to express himself grammatically and melodiously has towards being a great poet.