Many symbols in this world are neither good nor evil. They are neutral.
All the symbols of the tarrot cards are purely symbolic. There is a certain order to it that is based on divine wisdom.
Both the powers of good and evil can make use of symbols. It is the intent of the user that makes something good or evil.
As for the psychic ability to access future information, I do not give credit to the devil as the source of such ability.
I am a Christian but I do not consider psychic ability as satanic or of the devil.
The truth is, even the devil is using power that comes from the source (God).
How can the devil use God's power? Well, the explaination to such a mystery can be found at:
The Universal and Personal Aspect of God » Secrets of Mind and Reality
Hence, psychic ability is truly available for all beings of higher consciousness to develop and use. It is a natural ability that we all possess.