The Catholic Encyclopedia on Mind—
"If we are told that the explanation of a page of a newspaper is to be found in the contact of the paper with a plate of set types, we are still compelled to ask how the particular arrangement of the types came about, and we are certain that the sufficient explanation ultimately rests in the action of mind or intelligent being."
Or not so certain—
"These capacities for conscious deliberation, rational thinking and self-control are not magical abilities. They need not belong to immaterial souls outside the realm of scientific understanding (indeed, since we don’t know how souls are supposed to work, souls would not help to explain these capacities). Rather, these are the sorts of cognitive capacities that psychologists and neuroscientists are well positioned to study."
— "The Stone" column in yesterday's online New York Times
See also the Catholic Encyclopedia on Soul.