For they that have used the office of a deacon well purchase to themselves a good degree, and great boldness in the faith which is in Christ Jesus.
Purchase to themselves a good degree, х bathmon (G898) peripoiountai (G4046)] - 'are acquiring ... a
... step.' Not promotion to the higher office of presbyter. For ambition seems an unworthy motive to faithfulness for Paul to urge; besides, it would require 'a better degree.' Then the past aorist participle, 'they that used the office of deacon well,' implies that the present verb, 'are acquiring to themselves boldness,' is the result of the completed action of using the diaconate well. Moving upwards in church offices was as yet unknown (cf. Romans 12:7, etc.; 1 Corinthians 12:4-11).
Moreover, there is no connection between a higher church rank and "great boldness." Therefore, what those who faithfully discharged the diaconate acquire is 'a good standing place' (Alford) (a well-grounded hope) against the day of judgment (1 Timothy 6:19 [with peripoiountai (G4046) here: cf peripoieesin (G4047) sooteerias (G4991), 1 Thessalonians 5:9]; 1 Corinthians 3:13-14); ("degree" meaning figuratively the degree of worth which one has obtained in the eye of God, Wiesinger); and boldness (resting on that standing) as well in prayer and in preaching against error now, as also especially in relation to their coming Judge, before whom they may be boldly confident (Acts 24:16; Ephesians 3:12; Ephesians 6:19; 1 John 2:28; 1 John 4:17; 1 John 3:21; Hebrews 4:16).
In the faith - Greek, 'in (boldness resting on) faith.
Which is (rests) in Christ Jesus Which is (rests) in Christ Jesus.