„This is useful knowledge. With it the blind again see, the lame walk, the ill recover, the insane become sane and the sane become saner. By its use the thousand abilities Man has sought to recover become his once more.“
— L. Ron Hubbard American science fiction author, philosopher, cult leader, and the founder of the Church of Scientology 1911 - 1986
On Scientology in Scientology: A History Of Man (1952).