'The power of the greatest art is the power to shake us into revelation and rip us from our default mode of seeing. After an encounter with that force, we don't look at a face, a colour, a sky, a body, in quite the same way again. We get fitted with new sight: in-sight. Visions of beauty or a rush of intense pleasure are part of that process, but so too may be shock, pain, desire, pity, even revulsion. That kind of art seems to have rewired our senses. We apprehend the world differently.
Art that aims that high – whether by the hand of Caravaggio, Van Gogh or Picasso – was not made without trouble and strife. Of course there has been plenty of great art created in serenity, but the popular idea that some masterpieces were made under acute stress with the artist struggling for the integrity of the conception and its realisation is not a "romantic myth" at all. A glance at how some of the most transforming works got made by human hands is an encounter with "moments of commotion"...
that's what the author of the series Simon Schama writes about in the introduction to his series.