I have said it in a comment, in a simplistic way:

 "As above so below, as within so without". 

Furthermore, this balance of oppositions, within self (my interpretation of this cards combined), results from a process of Initiation, GNOSIS (wisdom that comes from life experience).



 

 The ying yang ☯️ 

 Yes, the masculine and the feminine...and so on... 

 The X and the nostr 👀 

 I never used X....🤷 

 That's good!