"Wherefore gird up the loins of your mind, be sober, and hope to the end for the grace that is to be brought unto you at the revelation of Jesus Christ; As obedient children, not fashioning yourselves according to the former lusts in your ignorance: But as he which hath called you is holy, so be ye holy in all manner of conversation; Because it is written, Be ye holy; for I am holy."
Ellen White directly references 1 Peter 1:13-16 in this passage.
"Loose thoughts must be gathered up and centered on God. The very thoughts should be in obedience to the will of God. Praise should not be given or expected; for this will have a tendency to foster self-confidence rather than to increase humility, to corrupt rather than to purify. Men who are really qualified, and who feel that they have a part to act in connection with the work of God, will feel pressed beneath a sense of the sacredness of the work, as a cart beneath sheaves. Now is the time to make the most earnest efforts to overcome the natural feelings of the carnal heart.— Testimonies for the Church 3:473, 474 . GW 131.2"
"Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;"
EGW's statement about bringing thoughts into obedience to the will of God directly echoes the sentiment of 2 Corinthians 10:5, which speaks of bringing every thought into captivity to the obedience of Christ.
"***** When a minister bearing the solemn message of warning to the world, receives the hospitable courtesies of friends and brethren, and neglects the duties of a shepherd of the flock, and is careless in his example and deportment, engaging with the young in trifling conversation, in jesting and joking, and in relating humorous anecdotes to create laughter, he is unworthy of being a gospel minister, and needs to be converted before he is entrusted with the care of the sheep and lambs. Ministers who are neglectful of the duties devolving on a faithful pastor, give evidence that they are not sanctified by the truths they present to others, and should not be sustained as laborers in the vineyard of the Lord till they have a high sense of the sacredness of the work of a minister.— Testimonies for the Church 3:233 . GW 131.3"
"A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach;"
The EGW passage expands on the qualities of a minister, echoing the biblical requirement for a bishop to be 'blameless' and of 'good behaviour.' It provides specific examples of behaviors that would disqualify a minister, aligning with the general principle of godly conduct.