Ludwig von Bertalanffy Quote
You cannot sum up the behavior of the whole from the isolated parts, and you have to take into account the relations between the various subordinate systems which are super-ordinated to them in order to understand the behavior of the parts.
p. 68 cited in: T.E. Weckowicz (1989). Ludwig von Bertalanffy (1901-1972): A Pioneer of General Systems Theory. Working paper Feb 1989. p. 2 - General System Theory (1968) - 3. Some System Concepts in Elementary Mathematical Consideration