“as Hume expressed it. The mind is 'a kind of theater, where several perceptions successively make their appearance; pass, re-pass, slide away, and mingle in an infinite variety of postures and situations.' Hume pointed out that we have no underlying 'personal identity' beneath or behind these perceptions and feelings which come and go. It is just like the images on a movie screen. They change so rapidly we do not register that the film is made up of single pictures. In reality the pictures are not connected. The film is a collection of instants”