The new powers in Velasquez and Rembrandt were connected with the problem of light, or rather, one might say, in the second case, of darkness. This new faculty of seizing the beauties, momentary and not inherent in the object, due to the various effects of atmosphere and lighting up, added probably a good third to the pleasure-bestowing faculty of art; it was the beginning of a kind of democratic movement against the stern domination of such things as were privileged in shape and colour. A thousand things, ugly or unimaginative in themselves, a plain face, a sallow complexion, an awkward gesture, a dull arrangement of lines, could be made delightful and suggestive. A wet yard, a pail and mop, and a servant washing fish under a pump could become, in the hands of Peter de Hoogh, and thanks to the magic of light and shade, as beautiful and interesting in their way as a swirl of angels and lilies by Botticelli. But this redemption of the vulgar was at the expense, as I have elsewhere pointed out, of a certain growing callousness to vulgarity. What holds good as to the actual artistic, visible quality, holds good also as to the imaginative value. Velasquez's Flagellation, if indeed it be his, in our National Gallery, has a pathos, a something that catches you by the throat, in that melancholy weary body, broken with ignominy and pain, sinking down by the side of the column, which is inseparable from the dreary grey light, the livid colour of the flesh--there is no joy in the world where such things can be. But the angel who has just entered has not come from heaven--such a creature is fit only to roughly shake up the pillows of paupers, dying in the damp dawn in the hospital wards.
It is, in a measure, different with Rembrandt, exactly because he is the master, not of light, but of darkness, or of light that utterly dazzles. His ugly women and dirty Jews of Rotterdam are either hidden in the gloom or reduced to mere vague outlines, specks like gnats in the sunshine, in the effulgence of light. Hence we can enjoy, almost without any disturbing impressions, the marvellous imagination shown in his etchings of Bible stories. Rembrandt is to Dürer as an archangel to a saint: where the German draws, the Dutchman seems to bite his etching plate with elemental darkness and glory. Of these etchings I would mention a few; the reader may put these indications alongside of his remembrances of the Arena Chapel, or of Angelico's cupboard panels in the Academy at Florence: they show how intimately dramatic imagination depends in art upon mere technical means, how hopelessly limited to mere indication were the early artists, how forced along the path of dramatic realisation are the men of modern times.