You need to take a look at all those kosher laws in the Bible. There are seven kinds of locusts, I think three are kosher, but four are not. Then there is the prohibition of wearing fabric that is made of more than one kind of fiber. Cotton, linen and wool are all okay, but if you combine them, God gets unhappy. Lobster and shrimp were banned because the priests though that they were bottom feeders. This is true of lobster, but not of shrimp.
The Bible is a lot like Mexican brujeria (witchcraft). Some things that are banned really are bad for you. Others are not. Some of the herbs actually do cure maladies. Others only seem to have a placebo effect.
Way up in the mountains around Mexico City is a small village called Chalma. Mexicans have a saying about impossible things. "Eso no lo consigues aunque vayas a bailar a Chalma." (You won't get that even if you go to Chalma to dance.) The custom goes back to Aztec times. If you wento to Chalma and danced before a certain idol, any wish you had would be fulfilled. The Church destroyed the idol and replaced him with an image of El Niño Jesús. So many Mexicans have the belief that if you walk to Chalma (it is about 50 miles, much of it uphill) and danced in the courtyard the padres de la iglesia had thoughtfully provided, your wishes would come true. If they didn't, you were not dancing sincerely enough.
If your wishes came true, you were supposed to give a gift and write a testimonial. If they didn't, tough. So over the years, there were lots of testimonials. Some pof the better ones were typewritten and pinned to a large bulletin board thing.
One Saturday, I drove up to Chalma, accompanied by a Jewish psyche major named Charlene. The road was very rocky, and I got a fractured oilpan. We told a passing truck and within an hour or so, a guy came back with a Model A Ford tow truck, which towed us to a village along the way, and we goit a guy to weld the oil pan. So we got to Chalma around 3:00 PM and there were a lot of campesinos dancing in the church patio. There was a guy with an accordion, several flautists and a couple of drummers playing off key. There were a lot of shops where you could buy candles, special candles, very special candles and all sorts of milagros (miracles) which are silver images of legs, hearts, arms, heads, which you buy and pin on a velvet cloth panel and light a candle and pray so that Jesus will fix your leg, arm, heart or head. The Church sells the milagros back to the vendors, so it seems to be a really good business.
We didn't dance or make any wishes. Charlene was, like many psyche majors, prone to various sorts of mental disturbances. One day she curled up in a fetal position in front of the potato chips in a small grocery store, and after several hours, she gave me the name of her psychiatrist, whom I called and she went back to Philadelphia. I never heard from her again.