In all my years of playing (reading) cards I have not come across a real positive association with the Jack of Spades.
Most of the descriptions suggest that this Jack is a real bad character. In the Madame Lenormand cards the Jack represents the Child. I suppose a child can go either way in the early stages of development, either the good way or the bad way, the positive or negative /or different. Maybe Madame Lenormand knew something we have yet to discover.
The Jack of Spades has been called a liar, cheat, crook, con, traitor, lazy, thief, hostile, jealous just to mention a few choice words. Shadow aspects are assigned to this Jack even though any of the court cards can demonstrate these characteristics.
We have all been the Jack of Spades at some point in our lives to some degree. I am reminded of the Thief card #30 in the Gipsy Zigeuner Wahrsagekarten deck.
A thief does not necessarily have to steal “things”, a thief can steal your heart & trust. Things can be replaced but trust takes a little longer and to open your heart up again- is a long term healing process. Betrayals can also be a reflection of self-betrayal, how are you cheating yourself? When you get the Jack of Spades in a reading, pay attention to what is going on with you inner dialogue & outer actions.
When you draw the Thief card and it is beside the House card (Croatian kuca, lopov)- it could very well mean a theft, so secure your residence but don’t be a psycho about it. Cards forewarn and what has been forewarned can be prevented and therefore does not materialize.
Cards mirror the flow of now. If you ignore a warning or an unreasonable fear, then it will materialize exactly the way the cards say so. Sure you have Free Will -the free will to accept or reject -the free will to choose your reactions and responses to situations. The free will not to have a card reading done.