Evidence Note / Observed Moment
John says this to Sherlock in 'His Last Vow', framing friendship as chosen responsibility after trauma and secrecy.
“The problems of your past are your business. The problems of your future are my privilege.”
Psychological Interpretation
The line reveals John's devotion as duty. He does not ask to erase Sherlock's past; he asks to stand inside the consequences that are still coming.
