{First be proved} (dokimazesth(9373)an pr(9374)on). Present
passive imperative third plural of dokimaz(935c), old and common
verb, to test as metals, etc. ( 1Th 2:4 , and often in Paul). How
the proposed deacons are to be "first" tested before approved
Paul does not say. See  Php 1:10  for the two senses (test,
approve) of the word. {Let them serve as deacons}
(diakoneit(9373)an). Present active imperative of diakone(935c) (same
root as diakonos), common verb, to minister, here "to serve as
deacons." Cf. diakonein in  Ac 6:2 . See also verse  13 . {If
they be blameless} (anegkl(8874)oi ontes). "Being blameless"
(conditional participle, ontes). See  1Co 1:8  Col 1:22  for
anegkl(8874)os.