We have noted that one difference between nature and art is, that nature is inexhaustible in her effects, and that an artist selects from her only some little part to make his work of art. Secondly, that he does not paint the whole of what he has selected, but out of it again selects certain parts; sufficient not to imitate the original, but to suggest its appearance. Thirdly, that natural truth is not the same as artistic truth; that while the scientific man studies one thing at a time so that he may know what is there, the artist tries to obtain an impression of the whole scene, and paints each part of it, not as he knows it to be, but as he can see it from his fixed position.