Stand in front of Turner’s Sun Rising Over Water (1825-30) and something odd tends to happen. The painting holds you, even though observers might struggle to say why. Maybe it is the colour, the balance, the composition, or the strange stillness the artwork seems to carry. Whatever it is, you feel it long before you can explain why. And the stranger next to you, looking at the same canvas with the same awe in their eyes, very likely feels it too.