All known religious beliefs, whether simple or complex, present one common characteristic: they presuppose a classification of all things, real and ideal, of which men think, into two classes or opposed groups, generally designated†profane and sacred.

-Durkheim, EŁ  mile
  The Elementary Forms of the Religious Life (translated by Joseph Ward Swain,1965).

In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military-industrial complex. The potential for thedisastrousrise of misplaced powers exists and will persist. 302

-Eisenhower, Dwight D(avid)
  Farewell address to the nation,17  Jan.

Thinking precisely and systematically about something as complex and irregular as a modern economy is very difficult, maybe impossible.

-Solow, Robert M
  In the NewYorkTimes Book Review, 30 Dec.