 A key interest of Bosanquet was the articulation of a theory of mind and will. In Psychology of the Moral Self, in a lecture on “The Organisation of Intelligence”, Bosanquet argues that “[t]he psychical elements of the mind are so grouped and interconnected as to constitute what are technically known as Appercipient masses or systems” (op. cit., p. 42). The mind or self, then, is a multiplicity of such systems. Bosanquet describes the mind, then, as “a growth of material, more like a process of crystallization, the material moulding itself according to its own affinities and cohesions” (op. cit., p. 9)—a view which, he says, is implicit in Plato and Aristotle.