The sunshine of Stevie Wonder's life when he wrote this song was Syreeta Wright, whom he married in 1970. Wright, who started at Motown Records as a secretary, co-wrote Wonder's hit "Signed, Sealed, Delivered I'm Yours
" that same year, and also all nine songs on Stevie's 1971 album Where I'm Coming From
. Wonder produced her debut album Syreeta
in 1972 and her next one, Stevie Wonder Presents: Syreeta
, in 1974.
Some sources list the couple's divorce as happening in 1972, but Wright, who died in 2004, claimed they were married until 1975. The marriage was difficult, and exasperated by their working relationship, which Wright found stifling. "I was always living in his shadow," she said.
"You Are The Sunshine Of My Life" finds wonder expressing his devotion to Syreeta - it's a husband looking upon his now-familiar wife and remembering why he loves her and always will. It didn't work out for this couple, but the sentiment was irrefutable. The song remains a heartfelt expression of undying love.