“That was something I wrote when I was about seventeen. I lived at 9 Newcastle Road. I was born on the ninth of October, the ninth month. It’s just a number that follows me around, but, numerologically, apparently I’m a number six or a three or something, but it’s all part of nine.” – John Lennon
That’s about all there is to it. John Lennon just really liked the number 9, even at 17. He apparently found it deeply meaningful that between himself, John Winston Ono Lennon, and his wife Yoko Ono they had nine O’s. I’m sure that there’s some dedicated fans tracking the number 9 numerology running all through Lennon’s life. Obviously, this wouldn’t be the last time he’d reference it.