„The “scanned symbol” is the only one of which the machine is… “directly aware.”“

— Alan Turing
„In some of the configurations in which the scanned square is blank... the machine writes down a new symbol on the scanned square: in other configurations it erases the scanned symbol.“
— Alan Turing
„The machine may also change the square which is being scanned, but only by shifting it one place to right or left.“
— Alan Turing
„If an ɑ-machine prints two kinds of symbols, of which the first kind (called figures) consists entirely of 0 and 1 (the others being called symbols of the second kind), then the machine will be called a computing machine.“
— Alan Turing
„One could only damage oneself through the harm one did to others. One could never get directly at oneself.“
— Jean Paul Sartre
„The machine is supplied with a "tape" (the analogue of paper) running through it, and divided into sections (called "squares") each capable of bearing a "symbol."“
— Alan Turing
„Symbol and myth do bring into awareness infantile, archaic dreads and similar primitive psychic content. This is their regressive aspect. But they also bring out new meaning, new forms, and disclose a reality that was literally not present before, a reality that is not merely subjective but has a second pole which is outside ourselves. This is the progressive side of symbol and myth.“
— Rollo May