Of course there can be wisdom in superstitions, but they have to be considered on a case by case basis.
Christians believe that the reading of tarot cards is of the devil. Of course, there isn't some external spiritual entity that will cause you harm should you use tarot cards, but it is bad mental hygeine to believe the future can be foretold. So, in a way, there some truth in the superstition that tarot cards are evil.
On the other hand, some ancient peoples believed that headaches and other physical ailments were caused by evil spirits. In order to release those spirits, a hole would be drilled in the head with crude stone tools in a process called trephination. I think it is safe to say that this particular superstition is nonsense, as medical science has shown that ailments always have a physical mechanism, and that drilling a hole in one's head is, in fact, harmful.
As for the Christian belief that genetic engineering interferes with God's natural order, that remains yet to be seen. Obviously, the universe doesn't care if we play God. There very well could be catastrophic real world consequences: perhaps genetically engineered individuals will have decreased immunity to disease or something through genetic fluke. Perhaps they won't. But the fact of the matter is, while China is trailblazing what could potentially revolutionize the human race, the U.S. is busy infighting over morality.
I think trepanning made sense in a way. What about brain surgery? We open the head of people to operate in the head. The ancient people weren't far off. They just didn't have the right tools and all our knowledge. And how if they didn't drill the head of the sick, how would we know now it is harmfull? Also, some modern chirurgy is harmful but we are drugged not to feel the pain.
And about predicting the future, you can to some extend. Human nature, both physically or emotionaly is pretty predictable. If you know the past and the present of someone, there is some chances that you will know his future. I don't know about the tarot card, so I can't say nothing about that, but it's really complicated and it deals with a lot of archetypes.
Maybe it's immoral for christians do think about the future because «Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Sufficient for the day is its own trouble» Matthew 6:34
About morality about genetic engineering, maybe it's good that someone think about that before we all end up like robots.
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