For me, position 7 is always self and position 8 is other, or you could say 7 is the inner state and 8 is the outer influence. Another way I look at it is 7 = action, 8 = reaction.
Once I had the Empress in 7 and the 4 of Wands reversed in 8. I told the querent they were trying to live their best, authentic life, but the message coming from the outside was basically, "you’re throwing everything away" - it was a breakup reading, so that fit pretty well.
Card 9, for me, shows the repeating pattern. You either listen to 7 and push through, which lets you level up into 10, or you give in to the pressure of 8 and end up looping back to card 1.
That’s how I tend to read those positions 🙂