Each individual work serves as an expression of our most personal state of mind at that particular moment and of the inescapable, imperative need for release by means of an appropriate act of creation: in the rhythm, form, colour and mood of a picture.

-Feininger, Lyonel
  Letter to Paul Westheim, quoted in Wolf-Dieter Dube The Expressionists (1972).

It is a fatal defect of current principles of administration that, like proverbs, they occur in pairs. For almost every principle one can find an equally plausible and acceptable contradictory principle. Although the two principles of the pair will lead to exactly opposite recommendations, there is nothing in the theory to indicate which is the appropriate one to apply.

-Simon, Herbert A
  Administrative Behavior.