thats what weed can do to people. schizophrenia is primarily an ego illness and cannabis has helped people achieve enlightenment which is the state of egoless bliss, thats why theres that old saying, theres a thin line between enlightenment and insanity, without someone knowing whats happening to you, you can go kuku.
heres a good article about enlightenment
http://personal.vsnl.com/ntrasi/index.html2
heres a good book about drugs/psychology/religion
http://www.amazon.com/exec/obidos/tg...glance&s=books
another good book is called Zen And The Brain
also, Joseph Campbell made a good statment about a schizophrenia isnt a master of his mind and cant move in and out of the enlightenment state of being and the state of most men, but the Shaman/Saint etc is a master of the two states of being