A Second Way of Knowing: The Riddle of Human Perception

activity animal appear asked associations attention awareness basic become began begin behavior believe brain called cells color comes common describe developed discover display dreams effect emotion environment event example experience explain facts feel figure fire function Gestalt gives green hand Helmholtz human humanist idea illusion important input interest interpret kind knowledge language learned light lines live look machine matter meaning mechanical information motion move Müller's mystery nature nerves nervous neurons never objective observer organs pain perceive perception person physical physicalists pleasure problem processing produce psychology qualities question reality reflex respond scientific scientists seems sensations sense sensory shape side simple smell sound speech subjective symbols theory things thinking thought tion trying turn understand visual whole