"...Metatron, the Prince of the Presence, said to Moses: "Receive the  letters [of Tarot and Kabbalah] ..." —The Third Book of Enoch
Just as humanity has done in so many cases, all that is sacred about the Tarot has been forgotten, and it has been reduced to a distraction, a way to cheat the foolish out of their money, or a way to entertain oneself. The modern use of the Tarot — for profit, distraction, and amusement — is as far from its true purpose as are the great temples of Egypt as tourist attractions. They were not made for that. Neither is the Tarot for playing around, fortune-telling, or making money. The Tarot is an ancient, sacred method of acquiring information for spiritual insight. It is personal. It is intimate. It is something that one should keep private, sacred, holy.
Metatron gave the Tarot and the Hebrew letters to humanity so that we, who are so confused and blinded by our psychological state, could have some way of acquiring reliable information.
The Tarot represents the laws of all things, thus the Tarot can be used to understand anything: science, religion, nature... But the most important use is to understand ourselves.
Anyone can use the Tarot to understand the forces at work in their lives, and get guidance regarding what they must do. However, being a way of receiving guidance from the divine within us, one must understand that the divine has absolutely no interest in our terrestrial ridiculousness.
Articles, Books, and Courses about Tarot
The Eternal Tarot
Tarot and Kabbalah
Alchemy and Kabbalah in the Tarot
What is the Tarot?