It is not enough for a wise man to study nature and truth; he should dare state truth for the benefit of the few who are willing and able to think. As for the rest, who are voluntarily slaves of prejudice, they can no more attain truth, than frogs can fly. I reduce to two the systems of philosophy which deal with man's soul. The first and older system is materialism; the second is spiritualism. Julien Offray de La Mettrie Please Note: This book is easy to read in true text, not scanned images that can sometimes be difficult to decipher. The Microsoft eBook has a contents page linked to the chapter headings for easy navigation. The Adobe eBook has bookmarks at chapter headings and is printable up to two full copies per year. Both versions are text searchable.