Identify Word/Phrase Meaning in Context Practice Test

Based on the passage: «Iūlia dīcit: “Sī omnia ad voluptātem referantur, quid erit iūstum?” Lūcius respondet: “Ratiō, quasi dux, moderētur cupiditātibus; aliter animus, velut equus effrēnātus, praecipitet. Nōn ego negō gaudia; sed, ut sint sēcūra, terminīs teneantur. Itaque sapiēns, cum possit, parcit, et, cum debeat, resistit. Sic fit ut libertās vera nōn in licentiā, sed in imperiō suī sit.”» In the context of the passage, what does moderētur imply?

Refer to the passage: Orātiō ficta—Mārcus dux, ante proelium, ad mīlitēs conversus: “Nōn ego vos ad caedem vocō, sed ad salūtem reī pūblicae. Hostis, quī agrōs vastat, nōn virtūte sed dolō nititur; ideo vigilāte. Sī quis vestrum timōre cēdat, exemplum malum dabit; sī stetis, etiam invītī cēdent. Ego ipse in prīmā aciē stābō, ut sciātis mē nōn verba dare sed perīculum partīrī. Nunc, dum signum exspectāmus, animōs in spem vertite.” What is the contextual meaning of the word aciē in the passage?