# When we talk mathematics, we may be discussing a secondary language built on the primary… by John von Neumann > "When we talk mathematics, we may be discussing a secondary language built on the primary language of the nervous system." > **— John von Neumann**, *The Computer and the Brain / related remarks; source verification pending* Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: The Computer and the Brain / related remarks; source verification pending.