Released prior to High As Hope, though not as an official single, “Big God” is about “obviously, an unfillable hole in the soul, but mainly about someone not replying to my text".

The track was premiered as Zane Lowe’s World Record on Beats 1 radio, 19th of June, with the music video premiering a day later on Apple Music.

The song features Kamasi Washington and credits producer Jamie xx as a co-writer.

According to Florence, the song was written to provide a tense atmosphere, with a feeling of release at the end. The co-producer Emile Haynie attempted to add strings to the sparse introduction, but Florence refrained from including these in order to maintain this tense sound.