Somak

From Memory Alpha, the free Star Trek reference

Professor Somak was a female instructor at Starfleet Academy, during the mid-24th century, who taught a course entitled, Moral and Ethical Issues of Command. Among the students she taught to during her career were Benjamin Sisko and Jadzia Dax.

One of her favorite speeches, according to Sisko, was "Alway maintain emotional distance between yourself and those under your command." Although, Dax considered it good advice and as much as Sisko tried to follow it, he noted that it is a lot more complicated outside the classroom. (DS9: "The Ship")