One of the things I have noticed over the years is how perfect scripture is laid out.
Additionally, the verses are all numbered. Do you think their may be a reason for this?
Have you ever thought about this?
Try this experiment sometime. Go through the new testament and look at all 3:3 verses and then all 6:6 verses.
Do you notice how the 3:3 verses pertain to an individual (tri-part human) and the 6:6 verses pertain to the corporate whole or single, corporate spiritual man?
Pretty amazing, huh?
I have also found that 7 relates to purification.
Have fun with this and consider giving thanks for his perfect Word.