Testimonies to the church volume 5

If wrongs are apparent among His people, and if the servants of God pass on indifferent to them, they virtually sustain and justify the sinner, and are alike guilty and will just as surely receive the displeasure of God; for they will be made responsible for the sins of the guilty. In vision I have been pointed to many instances where the displeasure of God has been incurred by a neglect on the part of His servants to deal with the wrongs and sins existing among them. Those who have excused these wrongs have been thought by the people to be very amiable and lovely in disposition, simply because they shunned to discharge a plain, Scriptural duty. The task was not agreeable to their feelings; therefore they avoided it." Testimonies for the Church 3:266 (1873). 5T 676.1

Prophets and Kings chapter 10 pp 142

When souls are in peril, God's ministers will not consider self, but will speak the word given them to speak, refusing to excuse or palliate evil.
Would that every minister might realize the sacredness of his office and the holiness of his work, and show the courage that Elijah showed! As divinely appointed messengers, ministers are in a position of awful responsibility. They are to "reprove, rebuke, exhort with all long-suffering." 2 Timothy 4:2. In Christ's stead they are to labor as stewards of the mysteries of heaven, encouraging the obedient and warning the disobedient. With them worldly policy is to have no weight. Never are they to swerve from the path in which Jesus has bidden them walk. They are to go forward in faith, remembering that they are surrounded by a cloud of witnesses. They are not to speak their own words, but words which One greater than the potentates of earth has bidden them speak. Their message is to be, "Thus saith the Lord." God calls for men like Elijah, Nathan, and John the Baptist—men who will bear His message with faithfulness, regardless of the consequences; men who will speak the truth bravely, though it call for the sacrifice of all they have.
God cannot use men who, in time of peril, when the strength, courage, and influence of all are needed, are afraid to take a firm stand for the right. He calls for men who will do faithful battle against wrong, warring against principalities and powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. It is to such as these that He will speak the words: "Well done, good and faithful servant; ... enter thou into the joy of thy Lord." Matthew 25:23 PK 141.3 - PK 142.2