dsgrue3 on 09 May 2013
Religion teaches you to believe in something without any evidence whatsoever. This has very profound implications. If you can simply take things on faith, you are an irrational person. Irrational thoughts can be used to do any number of dangerous things. It is this very reason that there are crimes of passion, fanboys arguing absurdities, suicide bombers, etc.
Spirituality is thought to be controlled by the serotonin system.
http://www.ncbi.nlm.nih.gov/pubmed/14594742?dopt=Abstract
Article about schizophrenia and its ties to religion:
http://www.smw.ch/docs/pdf200x/2004/25/smw-10322.PDF
