The intellect separates in space and fixes in time
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

““as it leaves the hands of nature, has for its chief object the inorganic solid;” it can only form a clear idea of the discontinuous and immobile; its concepts are outside each other like objects in space, and have the same stability. The intellect separates in space and fixes in time; it is not made to think evolution, but to represent becoming as a series of states. “The intellect is characterized by a natural inability to understand life;” geometry and logic, which are its typical products, are strictly applicable to solid bodies, but elsewhere reasoning must be checked by common sense, which, as Bergson truly says, is a very different thing.” source