Out of all the Midos that Yisro mentioned above (18:21), why did Moshe select only "Anshei Chayil"?
Seforno: Because, unable to find anyone with all the Midos, he opted for Anshei Chayil 1 as judges. 2
Oznayim la'Torah: Because Moshe took for granted that that generation 3 were all "Yir'ei Elokim," "Anshei Emes" 4 and "Sone'ei Batza." 5
Seforno: Over and above even Yir'ei Elokim - because knowledge and diligence take precedence over the fear of G-d in such matters - as the Gemara indicates in Shabbos 63a.
See also Rashi to Devarim 1:15.
Oznayim la'Torah: About whom the Torah testified, "va'Yire'u ha'Am Es Hashem" (14:31).
Oznayim la'Torah: Since he had taught them all Torah.
Oznayim la'Torah: Seeing as they had all their needs seen to. See Oznayim la'Torah, who also explains why Yisro thought otherwise.