I've been reading professionally and non, off and on, for over 35 years, and in that time, I've learned a lot of things I'd like to share with you all. The first of those is what I consider the single most important rule of all when it comes to reading.
If you have learned to read the Lenormand Fox as intelligence and wisdom and cunning, read it that way consistently. It doesn't mean deceit, and it doesn't mean escape (unless it's escape by being intelligent), and it doesn't mean a cheater or disloyalty or anything else. It means intelligence for you, and you should be consistent in reading it that way.
Except! Sometimes, the symbolic can be superseded by the literal. Sometimes, that Fox card means a literal fox, or red hair, or running quickly, or being chased. Even in these cases, your interpretation will be consistent, because those tie directly to the card itself. You're not going to suddenly say "Green!" or "Mongoose!" because the symbol on the card has nothing to do with those.
Your intuition, the question, the context, and many other potential factors will influence which meaning of the Fox you use, but those meanings are all consistent with the symbol on the card. If you remain consistent, then you will quickly build a strong language to communicate with, and your readings will become more accurate.
But Sometimes, I Have an Insight
There is no doubt that some people have insights and intuitions when reading, and a lot of books (and readers and wenbsites and videos and... ) mention the fact. A lot of people feel you should always trust those intuitions over what the cards (or runes or bones or...) are showing you, and go on to give very good reasons why you should do that. I have a thought about that.
So, it's not that you shouldn't trust your insights, visions, and what have you. You absolutely should. But that doesn't mean you should trust them unconditionally. It's really easy to get stuck in your head, in your own interpretation or daydream that has no relationship to reality, or generally just get it all wrong. The cards are tools that keep you grounded in the World so that you don't get lost in a rabbit hole following some interpretation that's way off track.
A decent reader is one who can mediate between the practical and the ethereal, and who can ground their visions in reality and explore all the possibilities of the cards. What that means, in terms of consistency, is that you should take that insight and determine how it is represented in or impacts the situations laid out in the cards in front of you.
Suppose you're reading some Tarot cards for a friend who wants to know about her relationship. You draw the Devil and the 3 of Swords - which are traditionally NOT a good sign for a relationship. But you have a really good feeling nonetheless, your intuition says that good things are happening, so you ignore the cards, and just go with the intuition.
And then later learn that she dumped the controlling bastard and was having heart-broken second thoughts about taking him back. For months, she second guessed her own worth, struggled with depression, and generally had a hell of a time. What gives? Where's that happy intuition you had? Why were you so wrong?
Consistency - Keep to the meanings of the cards, and don't ignore what they say. Figure out how your intuition fits in with what's before you.
Eventually, you might learn that after all those months of agony, your friend emerged from the other side much stronger, confident, and happy. She'd been through the wringer and was forced to find her own self-appreciation. You were right, but by ignoring the cards in favor of your intuition, your description of events left out some significant details, and left your friend without preparation or understanding of what was coming down the line.
What's So Great About Consistency?
The thing here is that your system is a language that describes the world. More specifically, it's a language of just so many words that has to describe the ENTIRE UNIVERSE and everything in it. 78 cards to describe space shuttles and microbes and polyamorous body modifcation experts. Just 24 runes to describe carburetors and acrylic paint and PCOS. And so on - each system has a limited set of "words" unique to itself that have to be enough, somehow, to communicate about everything that can possibly happen.
Now, imagine that same list of words, but feel free to ignore the meanings whenever you want. If you're communicating with someone (The Universe? Spirits? Ancestors? Who knows?), won't it be ridiculously more difficult if you don't use those words consistently?
You're talking to someone about their friend in a relationship, and they use the word that means "tied up". If you just decide on a whim, or because a thought popped into your head, or because you don't like difficult situations, or a little birdy told you it actually means "Happy Times!" - you're not communicating.
Consistency means those words will have the same meanings - or cloud of meanings - every time you use them. Even if you're not communicating with someone else, and it's just you and yourself, you should still be clear and consistent. You can't describe a light switch if you can't even use the words consistently - no one, including your own self, can trust that those words mean what they originally thought.
So what do you do?
Take those insights and visions and gut feelings, and figure out where they fit among the cards or runes or stars before you. Maybe they describe the particular face of a card or combination - your intuition that the job will work out is reflected in the Mice, who will eat away the problems slowly over time, a different picture than the usual understanding of the Mice in Lenormand, but it is still very appropriate - consistent, even - to the vision you had.
It's important to recognize too that sometimes, those visions might not be for the person you're reading for, or apply to an entirely different situation, or are details about a more important question that hasn't been asked. Be honest with your client and yourself, as you may be able to sort out what other information is coming through, and do it without setting aside the reading in the cards.
Sometimes the intuition you have will fall in between the cards. You've pulled your past, present, and future cards from this oracle deck, and you're ready to start explaining why things are going south with your aunt. You have a sudden vision of whispers and gossips, but the cards only show change, isolation, and joy at the end.
It seems likely that the change has been caused by those gossips, don't you think? That whispering campaign resulted in the isolation and the issues you've been having, but clearly, you'll get past it and back to the joyful relationship you used to have. Here, you had more insight into the start of things, which wasn't in the cards, but doesn't ignore or contradict them.