The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. [...] The sciences, each straining in its own direction, have hitherto harmed us little; but some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality and of our frightful position therein, that we shall either go mad from the revelation or flee from the deadly light into the peace and safety of a new dark age.

Howard Philips Lovecraft wrote this in 1926. I was surprised to learn that it’s apparently not about the “content protection specification” in Windows Vista.