Romans 12:6

(5) Having then gifts differing according to the grace that is given to us, whether prophecy, [let us prophesy] according to the (l) proportion of faith;

(5) That which he spoke before in general, he applies particularly to the holy functions, in which men are in greater danger if they sin. And he divides them into two types: that is, into prophets and deacons: and again he divides the prophets into teachers and pastors. And of deacons he makes three types: that is, those who are to be (as it were) treasurers of the Church, whom he calls deacons in the most proper sense: the others to be the governors of discipline, who are called seniors or elders: the third, those who properly serve in the help of the poor, such as the widows.

(l) That every man observe the measure of that which is revealed to him.