en_tn_condensed/tit/03/14.md

(Paul explains why it is important to provide for Zenas and Apollos.)

set before themselves

"be busy doing"

so that they may not be unfruitful

This double-negative can also be stated positively: "so they will be fruitful" or "so they can produce fruit for God" or "so their lives will be useful." (See: rc://en/ta/man/translate/figs-doublenegatives)