en_tn_lite_do_not_use/2ti/04/05.md

be sober-minded

Paul wants his readers to think correctly about everything, and he speaks about them as if he wanted them to be sober, that is, not drunk with wine. AT: "think clearly" (See: rc://en/ta/man/translate/figs-metaphor)

the work of an evangelist

This means to tell people about who Jesus is, what he did for them, and how they are to live for him.