'We see the human in the world as existing in three parts:
The experience of self/consciousness resides at the interface, able to look within or without, toward "imagination" or "reality". Self is a semipermeable boundary.'
- one's interior personal world,
- the external world of artifacts and others and
- the interface - the sensory and affective channels through which one perceives and manipulates the external world
Timothy Leary Design for Dying 1997