Hardest Sentence In The English Language According To Spider-Man

The Falcon: I mean, it takes a lot of courage to change your mind about something after going so far down the road. Saying “I was wrong,” has to be the hardest sentence in the English language.
Spider-Man: Actually, the hardest sentence in the English language is, “What are you doing with my wife?” There’s never a really good answer to that one.

From – Amazing Spider-man Vol. 1 #537