There are four causes or varieties of cause: 1.  The essence or quiddity (Form):  τὸ τί ἦν εἶναι. 2.  The necessitating conditions (Matter):  τὸ τίνων ὄντων ἀνάγκη τοῦτ᾽ εἶναι. 3.  The proximate mover or stimulator of change (Efficient):  ἡ τί πρῶτον ἐκίνησε. 4.  That for the sake of which (Final Cause or End):  τὸ τίνος ἕνεκα.  Grote’s Aristotle, I. 354. The four Aristotelian causes are thus:  1. Formal.  2. Material.  3. Efficient.  4. Final.  cf. Arist. Analyt. Post. II. xi., Metaph. I. iii., and Phys. II. iii.  The six causes of Basil may be referred to the four of Aristotle as follows: Aristotle. 1.  τὸ τί ἦν εἶναι 2.  τὸ ἐξ οὗ γίνεταί τι 3.  ἡ ἀρχὴ τῆς μεταβολῆς ἡ πρώτη 4.  τὸ οὗ ἕνεκα Basil. 1.  καθ᾽ ὅ:  i.e., the form or idea according to which a thing is made. 2.  ἐξ οὗ:  i.e., the matter out of which it is made. 3.  ὑφ᾽ οὗ:  i.e., the agent, using means. δι᾽ οὗ:  i.e. the means. 4.  δι᾽ ὅ:  i.e., the end. εν ᾧ, or sine quâ non, applying to all.