Horrors

"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. We live on a placid island of ignorance in the midst of black seas of infinity, and it was not meant that we should voyage far. 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 light into the peace and safety of a new dark age."

I think H. P. Lovecraft got it wrong. The mind has a wonderful ability to build maps of the world. We can expand those maps, building models of what we cannot see. We can bend our thoughts in all sorts of useful directions while drawing from a variety of inner resources. What we cannot do is see the world as it is, for the world doesn't exist until our eyes see it and our brain models it. But it's a mistake to believe that only one's own world is real or that what you do in the real world has no consequences.