[Puke]

well, some of us adapt and overcome. as EC put it, lots of people dont, and theres no way to tell which of us will cave in under pressure, until you start shooting at us.

now, staying focused in combat is alot different that trying to wrap your mind around things "that man was not meant to know"

for a good exploration of this, check out the works of H.P. Lovecraft and also Robert W. Chambers.

From _The Call of Cthulhu_:
"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. We live in 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 deadly light into the peace and safety of a new dark age."

also (as silly as their fiction is) look at how human society adapted in the world of 40K. its a new dark age, filled with religious superstition, paranoia, and fear. the empire rules with an iron fist, and people live in the shadow of the inqusition. sure, thats one way to adapt and overcome. but its also a way to crumble and fall in the face of our own fears and shortcomings. Space Marines can stand in the face of Chaos and fight back, but at what price? they live for combat, and are brainwashed killing machines. hardly human, in the traditional sense.