"Vision of Love" is set in common time and in the key of C major. Carey's vocal range spans from the low-note of E3 to the high whistle note of C7. The song's lyrics and melody were written and composed by Carey, with Margulies, Miller, Klyce and Rip on the instrumentals. Lawrence and Walden produced the song, which heavily deviated from its original version on Carey's demo. Michael Slezak from "Entertainment Weekly" wrote regarding the song's instrumentation and vocals "From those opening sci-fi-esque synths to that signature dog-whistle high note, Mariah's very first single is inspired: Even folks who object to her trademark vocal excesses are hard-pressed to fault this rousing, gospel-tinged song about finding 'the one that I needed.'"