Removing Half of Brain Improves Young Epileptics' Lives:
''We are awed by the apparent retention of memory and by the retention of the child's personality and sense of humor,'' Dr. Eileen P. G. Vining; In further comment from the neuro-surgeons in the John Hopkins study: "Despite removal of one hemisphere, the intellect of all but one of the children seems either unchanged or improved. Intellect was only affected in the one child who had remained in a coma, vigil-like state, attributable to peri-operative complications."
In The Wonder Of Being Human: Our Brain and Our Mind, Eccles and Robinson discussed the research of three groups of scientists (Robert Porter
and Cobie Brinkman, Nils Lassen and Per Roland, and Hans Kornhuber and Luder Deeke), all of whom produced startling and undeniable evidence that a "mental intention" preceded an actual neuronal firing - thereby establishing that the mind is not the same thing as the brain, but is a separate entity altogether
Of related interest on the "spiritual" aspect of man:
Intelligent Design - The Anthropic Hypothesis