There are no things man was not meant to know. There are, perhaps, things man is too dumb to figure out, but that's a different problem.
Because all books are forbidden when a country turns to terror. The scaffolds on the corners, the list of things you may not read. These things always go together.
Even now, I believe that to know how is useless if we do not know why. And there are too many who forbid us to ask.