 It is reasonable to suppose, for example, that the religious significance of the great cathedrals of the medieval period was not just a matter of the Christian stories with which they were associated, in so far as they were connected with, say, the deeds of particular holy figures or their relics. Their meaning is also given in their sheer sensory impact: through their monumental scale and controlled use of light, and through the interplay between the solidity of stone and the diaphanous qualities of glass, these structures can speak of the sacred by inducing a response of hushed wonderment. A further perspective on the phenomenology of liturgy is provided in the work of Dietrich von Hildebrand, who is interested in the connection between the formation of the person through liturgical practice and the development of new ways of engaging with the everyday world in perceptual and other terms. See for instance his comment that: