Board Thread:Warhammer 40k General Discussion/@comment-7232811-20130518221156/@comment-7232811-20130519174909

For the 'common people' bit (thought it could relate to almost everyone), I think they seem to believe in humours. For people reading this who don't know what they are, the concept of humours was invented by the ancient Greeks who thought that the body was made up of four main substances, black & yellow bile, (the latter also being known as phlegm) blood, & choler. According to them, they said that our moods, emotions, & personality were based upon an excess or lack of one or two humours, but they also believed that illness was due to your humours not being correctly balanced with each other.

As for the bit about reverse engineering, you're right on that, they consider innovation to be one of the cardinal sins that can be done.

& as for the Necrons, well they probably know things to do with physics & science that will directly contradict what we know & understand.