No education is worth having that does not teach the lesson of concentration on a task, however unattractive. These lessons, if not learnt early, will be learnt, if at all, with pain and grief in later life.

Cyril Connolly (1903-1974) English intellectual, literary critic and writer.

Enemies of Promise, Part 3, ch. 24 “Vale” (1938)
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Speaking as a personified Eton College, quoting one of the masters there.