The Physics of Aristotle
"
Four kinds of causation:
Ð
Material Ð what something is made of
Ð
Formal Ð how structured
Ð
Efficient Ð what forces involved
Ð
Final Ð what purpose
"
The two-realm and four-cause view of
reality were strongly influential till modern
times, as they provided both consistency
and believable explanations.