Much of 21
concerns the ending of a relationship Adele went through after the release of her previous debut album. Initially the singer penned a series of vitriolic songs about her ex such as "Rolling In The Deep
." However, Adele told Spin
magazine as the months wore on she begun to reconsider. "I started to realise I'm not as great as I thought as a girlfriend. I felt quite bad about writing a record that's all F--- you." This prompted her to write some new tracks that provided a sense of balance. They included this track, which is about "admitting your flaws, accepting you're wrong."