The middle voice is used
to express an action done by the subject done in his or her own interest.
not think of the middle as the reflexive (as in the sentence "He cut himself").
Wenham (p. 93) says that the middle is more like the active than like the
passive a "sort-of-Active." Classical Greek usually would use
the active voice with a reflexive pronoun. In koine Greek, however, the middle
sometimes functions as the reflexive.
"He cut himself."
"He cut wood [for himself]." (middle voice)