1 Peter 5

To those who hold the Melchizedek priesthood, Peter particularly addresses -

"...I exhort...Feed the flock of God which is among you, taking the oversight thereof, not by constraint, but willingly; not for filthy lucre, but of a ready mind;
3 Neither as being lords over God's heritage, but being ensamples to the flock." (New Testament 1 Peter 5:1 - 3)

The first obligation is to teach and not only teach but teach by example. And to accept callings and responsibilities willingly, and not only willingly but with a ready or prepared mind. We read in modern day the Lord has followed -

"No power or influence can or ought to be maintained by virtue of the priesthood, only by persuasion, by long-suffering, by gentleness and meekness, and by love unfeigned;
42 By kindness, and pure knowledge, which shall greatly enlarge the soul without hypocrisy, and without guile—"(Doctrine and Covenants Section 121:41 - 42)

Peter continues with much the same counsel -

"Likewise, ye younger, submit yourselves unto the elder. Yea, all of you be subject one to another, and be clothed with humility: for God resisteth the proud, and giveth grace to the humble.
6 Humble yourselves therefore under the mighty hand of God, that he may exalt you in due time:
7 Casting all your care upon him; for he careth for you.
8 Be sober, be vigilant..." (New Testament 1 Peter 5:5 - 8)

It is this priesthood -

"That the rights of the priesthood are inseparably connected with the powers of heaven, and that the powers of heaven cannot be controlled nor handled only upon the principles of righteousness." (Doctrine and Covenants Section 121:36)

And -

"...whoso is faithful unto the obtaining these two priesthoods of which I have spoken, and the magnifying their calling, are sanctified by the Spirit unto the renewing of their bodies.
34 They become the sons of Moses and of Aaron and the seed of Abraham, and the church and kingdom, and the elect of God." (Doctrine and Covenants Section 84:33 - 34)

Therefore -

"Feed the flock of God which is among you..." (New Testament 1 Peter 5:2)