Romans 12

Gifts of Grace

3For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned. 4For as in one body we have many members,[e] and the members do not all have the same function, 5so we, though many, are one body in Christ, and individually members one of another. 6 Having gifts that differ according to the grace given to us, let us use them: if prophecy, in proportion to our faith; 7if service, in our serving; the one who teaches, in his teaching; 8the one who exhorts, in his exhortation; the one who contributes, in generosity; the one who leads,[f] with zeal; the one who does acts of mercy, with cheerfulness.

the one who leads, with zeal (KJV and NIV: diligence)

zeal |zēl|
noun
great energy or enthusiasm in pursuit of a cause or an objective : his zeal for privatization | Laura brought a missionary zeal to her work.
ORIGIN late Middle English : via ecclesiastical Latin from Greek zēlos.

Thesaurus
zeal
noun
Ross's zeal for football passion, ardor, love, fervor, fire, avidity, devotion, enthusiasm, eagerness, keenness, appetite, relish, gusto, vigor, energy, intensity; fanaticism. antonym apathy, indifference.