This song has a tendency to make people happy when they hear it. Allee Willis, who wrote the song with Maurice White and Al McKay from Earth, Wind & Fire, describes it as "Joyful Music." It was the first song Willis wrote with the band, and quite a learning experience. Says Willis: "Their stuff was very much based on Eastern philosophies, an incredibly positive outlook on life; the lyrical content of their songs was not typical of what would have been in Soul music at that time. So when I left the studio that first day, Maurice gave me the name of a book, it was called The Greatest Salesman In The World
, and he sent me to the Bodhi Tree, which is a very spiritual bookstore here in L.A. I got that and a bunch of other books that the saleswoman said was the philosophy. And what went from being a very simple experience turned into, for me, an incredibly complex experience. Because I dove into these books. And even the way they were written, the language they were written in, I kind of didn't understand anything. But Maurice told me right from the jump he thought I was a very spiritual person, and I was put here to communicate. And I thought, if Maurice was saying that to me, I need to hang with this. I was pouring through these books for a couple of months. Lyrics started being 25-30 pages long as I'm trying to figure all this stuff out. Reading all that stuff changed me forever. He lead me to a path I've stayed on. So 'September' was fantastic and thrilling, and they had started the intro of it by the time I had walked into the studio to meet everyone. Just as I opened the door and I heard that little guitar intro, I thought, Oh God, please let this be what they want to work with me on. Because it was so obviously a hit."