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Reversed
Temperance reversed is life out of balance. You are focusing on one aspect of your life and ignoring other parts that are equally important. You haven't found a way to create a peaceful yet productive life. If you asked about a relationship, he will remain a friend. You will feel comfortable, but no sparks. It may feel like a roommate situation, or like two frat guys hanging out. Also, you might be hoping for something that can never be, maybe he is gay and you are straight (or vice versa), whatever the reason, he/she is just not romantically attracted to you. You are a friend and that is all!
15-The Devil
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The Devil is about temptation, greed, addiction, or any type of uncontrollable urges. This is not necessarily an "evil" card, it's about the darker side within. Your lower urges are taking over and leaving you as a shadow of who you really are. It could be a drug/alcohol addiction or an abusive relationship. If you asked a question that seems "innocent" to you, yet you get this card, it means it's a bad idea and you will hurt the people closest to you in seeking out these selfish desires. This is not a good card to get, but it is not too late to seek help. If you asked about love, your love interest has inner demons. If you asked about a relationship, it will be volatile. If you are already in an unhealthy relationship, this card can be seen as a warning to get out immediately. *This card is not always bad if you ask specifically about wanting a sexual relationship, it is a very sexual card, it can imply bondage or any other kind of "out of the box" sexual experiences. Sex might become all you have in common and bind you together, but most likely there will be no "meeting of the minds" and lacking commitment. If that is what you are looking for then go for it.
Reversed
The Devil reversed is when it is too late. The situation has reached "the point of no return". This is when someone commits suicide or dies of a drug overdose. The abuse and/or pain has become unbearable. Your inner demons are beyond help. If you asked about a potential love interest, just walk away, it is better to never know what this person is capable of. These are the the people we see on the news and can't fathom how, why, or what could have possibly made them this way. *If he is a normal guy and you get this card, with no red flags stating otherwise, then he is simply an asshole (for lack of a better word) and he will spend his life treating you like you are gum stuck to the sole of his shoe, he will have no compassion for you. He may not have empathy for anyone, most likely he will not know how to.