“Each age is characterized by its own astronomical myriads of new, special-case experiences and problems to be stored in freshly born optimum capacity human brains — which storages in turn may disclose to human minds the presence of heretofore undiscovered, unsuspectedly existent eternal generalized principles.”

Preface
The Reorganization of the European Community (1814)

Emotional Architecture as Compared to Intellectual (1894)
Context: The human mind in all countries having gone to the uttermost limit of its own capacity, flushed with its conquests, haughty after its self-assertion upon emerging from the prior dark age, is now nearing a new phase, a phase inherent in the nature and destiny of things.
The human mind, like the silk-worm oppressed with the fullness of its own accumulation, has spun about itself gradually and slowly a cocoon that at last has shut out the light of the world from which it drew the substance of its thread. But this darkness has produced the chrysalis, and we within the darkness feel the beginning of our throes. The inevitable change, after centuries upon centuries of preparation, is about to begin.

1960s, Operating Manual for Spaceship Earth (1963)
Context: Our brains deal exclusively with special-case experiences. Only our minds are able to discover the generalized principles operating without exception in each and every special-experience case which if detected and mastered will give knowledgeable advantage in all instances.

"James Clarence Mangan" (1902)

Source: The Genteel Tradition in American Philosophy (1911), p. 64
Context: Because the peculiarity of man is that his machinery for reaction on external things has involved an imaginative transcript of these things, which is preserved and suspended in his fancy; and the interest and beauty of this inward landscape, rather than any fortunes that may await his body in the outer world, constitute his proper happiness. By their mind, its scope, quality, and temper, we estimate men, for by the mind only do we exist as men, and are more than so many storage-batteries for material energy. Let us therefore be frankly human. Let us be content to live in the mind.

"Humanity", Ch.II "Ideologies: A way to live", Part I

Source: https://www.youtube.com/watch?v=Ifi5KkXig3s "Biblical Series IV: Adam and Eve: Self-Consciousness, Evil, and Death"

Variant: The principle of bounded rationality [is] the capacity of the human mind for formulating and solving complex problems is very small compared with the size of the problems whose solution is required for objectively rational behavior in the real world — or even for a reasonable approximation to such objective rationality.
Source: 1940s-1950s, Administrative Behavior, 1947, p. 198.

1005.52 http://www.rwgrayprojects.com/synergetics/s10/p0520.html#1005.50
1970s, Synergetics: Explorations in the Geometry of Thinking (1975), "Synergy" onwards