Figure: The Pali Canon's Six Sextets:
 
  sense bases  
 
  f
e
e
l
i
n
g
   
 
  c
r
a
v
i
n
g
   
  "internal"
sense
organs
<–> "external"
sense
objects
 
 
contact
   
consciousness
 
 
 
  1. The six internal sense bases are the eye, ear,
    nose, tongue, body & mind.
  2. The six external sense bases are visible forms,
    sound, odor, flavors, touch & mental objects.
  3. Sense-specific consciousness arises dependent
    on an internal & an external sense base.
  4. Contact is the meeting of an internal sense
    base, external sense base & consciousness.
  5. Feeling is dependent on contact.
  6. Craving is dependent on feeling.
 Source: MN 148 (Thanissaro, 1998)    diagram details