Aeon418
You might find Jim Eshelman's, Liber Theta, useful. It breaks down each of the Minor cards into it's component parts. (Minor card summaries start on p.35 onwards.)
http://thelema.org/publications/books/LiberT.pdf
For example, here's the 3 of Wands.
As you can see Sun in Aries is just one part of the card. There's Binah of Fire to consider because this card is a 3 and in the suit of Wands. (Binah is the 3rd sephira, so all the 3's correspond.)
Being unfamiliar with Qabalah you might also wonder where Saturn came from?! Saturn corresponds with Binah and hence to the number 3.
http://thelema.org/publications/books/LiberT.pdf
For example, here's the 3 of Wands.
Liber Theta said:Three of Wands
VIRTUE
(Previously called, “Established Strength.”)
Meditation Pattern: Place Atu XIX, The Sun, and Atu IV, The Emperor, side-by-side, with the 3 of Wands above them.
Traditional Description: Three wands in the center: two crossed, and the third upright between them. Flames issue from the point of junction. Above and below are the symbols Sun and Aries.
Binah of Fire: The establishment of primeval energy. Self-respect, integrity, arrogance, selfassertion; that is, the ideas of Will and Dominion (the two previous cards) now have become interpreted in terms of character.
Sun/Aries: Established force or strength. Realization of hope. Leadership, enthusiasm, courage. Formulation, birthing. Pride, nobility, wealth, generosity, power, obstinacy, conceit. Rude self-assumption, insolence, conceit.
Saturn + Sol: Firm, decisive, determined, persevering; completion of labor; attaining to a certain status; yet withdrawn, private, secluded.
As you can see Sun in Aries is just one part of the card. There's Binah of Fire to consider because this card is a 3 and in the suit of Wands. (Binah is the 3rd sephira, so all the 3's correspond.)
Being unfamiliar with Qabalah you might also wonder where Saturn came from?! Saturn corresponds with Binah and hence to the number 3.