The greatest minds are simple, -- and deep: little minds may also be simple, -- and shallow. Well thought out, this remark of St Thomas will explain the riddle how it comes to pass that, while the highest being is simple and one, nevertheless in biological and political science differentiation of organs marks the higher animal and the more highly developed state. There is a poverty-stricken simplicity: there is a clumsy multiplicity, a sort of boorish wealth: there is also an artistic multiplicity, where every detail is subordinate to one design. A cosmos is a matter of unity: a chaos is 'a manifold.' The grandest and highest of beings is a formal unity, actually one, virtually many and all.

Of God and His Creatures: 3.20