What is the specific psychological principle of tarot cards?

I think it has something to do with people's associative ability. When you see a card, you will associate the meaning of the card with yourself and equate imagination with reality, just like the truth in this passage in "Angels will love you for me". "When the coin slowly sinks to the bottom, it is like a good wish being treasured. When the sun is shining, coins will shine a little under the water; When the fountain splashed happily, it was like a wish in a coin singing. Perhaps, only coins can't make wishes come true, but when you put it in the fountain, there is hope. For this hope, you will work hard to refuel, and then your wish will really come true. "