William James

whilst a very few ounces of alcohol or grains of opium or hasheesh, or a whiff of chloroform or nitrous oxide gas, are sure to have the second. The delirium of fever, the altered self of insanity, are all due to foreign matters circulating through the brain, or to pathological changes in that organ's substance. The fact that the brain is the one

The spiritualist and the associationist must both be 'cerebralists',

it will be safe to lay down the general law that no mental modification ever occurs which is not accompanied or followed by a bodily change.