The National Gallery's Van Gogh: Poets and Lovers is 'unmissable'
Every painting is a "gamble, an experiment, a chucking of artistic caution and convention to the mistral wind". You can feel the "churn" of his brush strokes; indeed, in parts, the impasto is as thick as a bead or a button. The colours are "perverse" with fields alight with "cobalt and saffron".