Final
causes coincide with the purpose of nature, the biological potential, which
Driesch named entelechy.[1]
Entelechy is a Greek word whose derivation (en-telos) means something that
contains in itself its own end or purpose, and that evolves towards this end.
So, if the path of normal development is interrupted, the system can achieve
the same end in another way.
The Vital Needs Theory - page 64