Unstable (song)

[1][2] On the song, Bieber speaks about struggling to love himself in the past and his wife, American model Hailey Bieber, supporting him in his bad days as he sings in the first verse: "Sometimes I think I overthink / Then I start to feel anxiety / There were times I couldn't even breathe / But you never once abandoned me".

On March 19, 2021, the same day that the song and album were released, in an interview with Vogue, Bieber spoke on the nature of the song and revealed that it was about his wife supporting him throughout his dark times the previous year: I was in a really, really bad place maybe a year ago.

[5] Craig Jenkins from Vulture gave a negative review, where he felt that the song contains "morose chords that don't go anywhere".

[6] Chris Willman of Variety saw the song as one of Bieber's strong moments on the album and felt that it shows that "he and his army of co-writers do find rhythms for him to expertly slide into that allow for nearly subtle syllabic echoing".

[8] Similarly, Alexander Cole of HotNewHipHop opined that the song "makes for a dope collaboration that allows both artists to truly shine".