Sallust, Jugurthine 3. 3-4:
"frustra autem niti neque aliud se fatigando nisi odium quaerere extremae dementiae est; nisi forte quem inhonesta et perniciosa libido tenet potentiae paucorum decus atque libertatem suam gratificari."
"To strive in vain and to seek nothing other than hatred, from the exhausting of self, is the extreme of folly; unless, by chance, someone can be impelled by dishonourable and pernicious passion, to seek the glory and freedom of a few."
Firstly, given that "neque aliud" means "nothing else but"; "nothing other than", what is the role of the first "nisi"?
Secondly, is "fatigando" a gerundive, agreeing with "se" (ablative) giving, "from exhausting self"; or, a gerund giving, "from the exhausting of self"? This has a gerund taking an accusative direct object ("se"), which isn't supposed to happen. Also, the direct object would have to be a genitive, "exhausting of", would it not?
In the oblique cases gerundives tend to lose their passive and deontic qualities, functioning like gerunds, though they must still agree (number, case, gender) with the nouns they are describing. Further, as "se" is both accusative and ablative, differentiating between gerund and gerundive, in this example, is not so clear-cut.
