~first~ and ~second~, the 7 and the 9 usually get along well if there is not too much interaction. Although they are compatible in some areas, they are generally not that interested in each other's issues. If you imagine the 7 and 9 as two archetypes forced to spend time together at a social event, you will witness them politely, although superficially, chatting for a few minutes, then running out of things to talk about and lapsing into silence. They do not dislike each other; they just do not share common interests. 

Although the numbers in this part of your chart do not add excitement and energy to your relationship, on the plus side they rarely cause discord. Keep in mind this is only one area of your chart; other numbers and influences will reveal additional aspects that may mitigate this deficiency.

Religion is area where the 7 and the 9 tend to be incompatible. ~first~ (the 9) thrives on faith and has the intuitive understanding that things are already in balance (without the need to manipulate them). ~second~, on the other hand, uses logic and reason and does not accept things at face value. ~second~ questions everything and (at least as reflected by this part of the chart) "belief" is alien to their intellectual quest for understanding. 
 
Your differing tastes may generate other areas of conflict. ~second~ might prefer to live in a large city, while a cozy chalet in the countryside would be paradise for ~first~. (Helpful hint: When it comes to choosing colors and furnishings for the home, the 9 is unquestionably better suited to the task.) Every number combination has challenges. Yours will likely revolve around differing interests and your contrasting views on issues that arise.