I had my first experience/exposure to Tarot Cards and their interpretations while visiting a good bookstore two blocks from where I had just moved to in Venice. The bookstore where the readings/workshop was held has a great number of very good books segregated by religion and philosophy, so I plan to visit there quite often.
What was most striking about this experience was how good, sensible, intelligent, successful grown men and women would place such great faith in the random drawing of and interpretations of the cards that they were dealt with, while at the same time making obvious disparaging remarks about Catholicism and Christian principles about what is most important in life such as Motherhood and Fatherhood.
In fact, the lady sitting next to me exhibited such great faith in the correctness of the cards revealing myself to her and the group -- by her constant advice on what the cards said about myself even though she had never met me before in her life and will probably never see me again (but somehow the Tarot Cards showed my true self to her, a complete stranger)-- that I thought of the scriptures that state that our generation was "ever learning but never coming to a knowledge of the truth," "trust not in the arm of the flesh," and finally, "doctrines of seducing spirits and commandments of men." The gospel way of life did not seem important to these people who seemed basically good and sincere(?) in their attempts to better themselves and find happiness and fulfillment, so it seemed they chose another a to find meaning to their lives.
Sadly, I believe once we supplant the Lord and seek to counsel Him indirectly through a medium such as giving and seeking advice via Tarot Cards, we open ourselves to suggestion from and susceptibility to the whisperings and machinations of the adversary.
But don't we experience that every day from other people, the media, and from our daily temptations and trials?
The Book of Mormon states to "trust no one to be your teacher nor your minister, except he be a man of God, walking in his ways and keeping his commandments," because then we are taught by the Holy Ghost, who we are told we can trust because the Spirit tells of things "as they really are" and "really will be."