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.