Perception is of two kinds mainly, viz. phenomenal and psychological. The former deals with perception to objects, touch and other physical attributes. The latter denotes intuition and the way of looking at things. A famous example here would be, ‘is the glass half full or half empty?’ This infamous question has been asked to many people to determine their level of optimism and pessimism. Innumerable science fiction novels and articles have been written on perception and the overlapping of perception and reality. Read the next section to read about the famous awareness quotations and sayings.