Is There Knowledge We Should Not Seek or Is There?

Is There Knowledge We Should Not Seek or is there? Or Is Knowledge Inherently A Good Thing And Can Only Persons be harmful?
In the modern world we have witnessed the capability of science to produce weapons of mass destruction and improve our ability to cure diseases. We have seen on our televisions the effects of the wars that were 'needed' to contain communism, and many witnessed the human race extend our reach to space. Anything known to anyone is knowledge, whether it is at a personal level, such as knowing a secret about someone, or having the ability to destroy the world six times over. There are some who say that some knowledge should not be sought as the possible damage caused could threaten life on Earth, where others insist on pioneering and striving to gain more knowledge. There is also knowledge, which some people see as harmful, as the Catholic Church did with Galileo when he openly supported the Copernican theory (that the Earth and all the planets move around the sun). Galileo was tortured and excommunicated, although his theory was correct.
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