Tactile values
A most important aspect of Indian sculpture is its appeal to the hand, and the sense of touch. In the West we have taught ourselves almost entirely to ignore this sense. Indeed, to appeal to it is quite often considered degrading and morally reprehensible. The pejorative use of the words sensual or sensuous one often meets in the West depends largely upon a negative attitude to this whole range of experience. On the other hand, it is highly significant that the Indians, when they wished to show the superiority and multiplicity of powers of a divine person, gave him a multitude of hands. It will not escape notice either how expressively, and with what reverence, the hand itself is treated in Indian art.
The absorption in tactile experience of the ordinary Indian is very striking to the Westerner. Generalizations about a people are always dangerous, and there are certainly exceptions to this one.  But someone who has been in India and seen how the people use their hands, patting mud walls into shape, squeezing together their mouthfuls of food or even walking along a city street hand in hand, cannot miss the fact. What Bernard Berenson 'discovered' as the tactile values of post-Giotto painting in Renaissance Italy are, by Indian standards, remotely intellectual forms, sifted back into the realm of visual, non- tactile experience, by being rendered into shadow and light.
A gesture of the hand gains its life from the Indian's fund of direct tactile experience. Life comes from the sculptured outline, with its slow undulation given by the large unqualified forms, prominent, self-contained and smoothly executed. Even though the logic of Indian sculpture is visually clear and consistent, it is a logic partly derived from the necessities of touch, because the integrity and force of a tactile experience depend in the last resort on a pure continuity of the total surface of the work.
Again, the character of the Indian light is something with which the Indian sculptor has had to cope. It has determined some of the special characteristics of Indian stone sculpture, far the larger part of which seems to have been intended for out of doors. That some of the greatest works were intended for interiors of caves or shrines does not affect this factor.  Such works were a distinct minority, and sculptural ideas which did take account of the exterior lighting were at no particular disadvantage when applied indoors.
The Indian sun throws a direct and definite illumination; shadows have clear and emphatic edges; their dark seems very dark in comparison with the strength of the light. A sculpture like, say, one of the figures on the north or south porches of Chartres Cathedral would seem under Indian conditions to exhibit a rash of shadow spots, which would destroy the continuity of the surface, and obliterate its definition. The diffused light of the north enables one to see the character of the surface in the shadowed parts even of a Rodin bronze. But the glaring light of India's dry atmosphere makes what lies on the shadowed side of a form virtually invisible. Hence the carefully rubbed-down smoothness of Indian sculpture, and hence again the elaborately exhibited continuity of surface.