from Julian Bell's review of "Leonardo da Vinci: Painter at the Court of Milan" show at the National Gallery:
Perhaps variety is what this exhibition, this collection of the outstanding remains of a one-man civilization, is best fitted to offer. If you seek the coherence to all these phenomena you might need to turn to the scientific vision behind them, as Martin Kemp did in his illuminating book Leonardo da Vinci: The marvellous works of nature and man (1981). There you are led to consider the concept of the movements of the mind as a special case of a comprehensive investigation into movement. Whether through cogs and pulleys or through their fleshly equivalents (a parallel sometimes made explicit in the show's anatomical drawings), whether through patterns of plant growth and rock formation or through the workings of water and light, all that appears before our eyes must be governed by movement, a universal process organized around harmonic intervals.