85% sureThese words were traced back to where they first appeared. That source is listed below.
What turned up
De Profundis (written 1897, published 1905); Project Gutenberg #921, primary text confirmed; leading word 'Then' dropped for standalone use.
Work
De Profundis
Occasion
1897
Sources checked
gutenberg.orgChecked using claude-sonnet-5, 21 August 2026Project Gutenberg edition of De Profundis; confirmed exact sentence, originally 'Then I must learn how to be happy.'
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