“To understand oneself in existence is the Christian principle, except that this self has received much richer and much more profound qualifications that are even more difficult to understand together with existing. The believer is a subjective thinker, and the difference, is only between the simple person and the simple wise person. Here again the oneself is not humanity in general, subjectivity in general, and other such things, whereas everything becomes easy inasmuch as the difficulty is removed and the whole matter is shifted over into the shadow play of abstraction.”

Heretics (1905)

Introduction.
On the Complexity of Causal Models (1977)

Original: (it) Ogni ambizione ha le sue difficoltà. Nella vita le cose semplici non esistono.
Source: prevale.net

Self and World (1957)

This has sometimes been paraphrased: "The simple things are also the most extraordinary things, and only the wise can see them."
Source: The Alchemist (1988), p. 15.

The proposition that morale predicts productivity is just one specification of this.
Source: 1970s, Complex organizations, 1972, p. 115

Source: Laughable Loves

Source: The Unabridged Journals of Sylvia Plath