“The higher processes are all processes of simplification. The novelist must learn to write, and then he must unlearn it; just as the modern painter learns to draw, and then learns when utterly to disregard his accomplishment, when to subordinate it to a higher and truer effect.”

Antisthenes, 4.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 6: The Cynics

Morris Udall
Johnson, James W. (2002). Arizona Politicians: The Noble and the Notorious, illustrations by David `Fitz' Fitzsimmons, Tucson: University of Arizona Press. pp 155. ISBN 0-8165-2203-0.
About

Source: The Education of Henry Adams

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 565.

"Fall of a City"
Selected Poems (1941)
Context: All the lessons learned, unlearned;
The young, who learned to read, now blind
Their eyes with an archaic film;
The peasant relapses to a stumbling tune
Following the donkey`s bray;
These only remember to forget. But somewhere some word presses
On the high door of a skull and in some corner
Of an irrefrangible eye
Some old man memory jumps to a child
— Spark from the days of energy.
And the child hoards it like a bitter toy.

Variant: The moment people come to know love, they run the risk of carrying hate.

Learning

Source: The Light That Failed