There's an immense amount of wisdom contained within the Tarot, and a number of means of reading Tarot cards exist.
The language of the Tarot is something internal that must be learned; it can only be understood through practice. One learns the individual meanings of cards, though the best reading comes from a knowledge of traditionally associated meanings (of which there are all kinds of variations) and use of one's own intuition.
The process can also not be forced. It's best to allow each of the cards to absorb into one's mind, bypassing the conscious mind's attempt to slay meaning and to allow the inner self to grasp the archetypal meanings of the cards.
Curiously, I had an argument with someone long ago about the transmission of complete pieces of knowledge through imagery and ritual. His assertion was that one can only do that through the conscious mind, while I (correctly) asserted that the mind absorbs far more than we realized.
No doubt, one may learn things from a conscious perspective; that's obvious and not in question. But we learn much more than from this means. That doesn't mean the transmission of knowledge can't be abused- it can be.
Guard your thoughts, guard your mind. Always maintain the utmost of integrity and ethical standards.