"Those who labor in business lines should take every precaution against falling into error through wrong principles or methods. Their record may be like that of Daniel in the courts of Babylon. When all his business transactions were subjected to the closest scrutiny, not one faulty item could be found. The record of his business life, incomplete though it is, contains lessons worthy of study. It reveals the fact that a business man is not necessarily a scheming, policy man. He may be a man instructed of God at every step. Daniel, while prime minister of the kingdom of Babylon, was a prophet of God, receiving the light of heavenly inspiration. His life is an illustration of what every Christian business man may be.... GW 424.1"
"Then the presidents and princes sought to find occasion against Daniel concerning the kingdom; but they could find none occasion nor fault; forasmuch as he was faithful, neither was there any error or fault found in him."
EGW directly references Daniel's integrity in his business dealings and explicitly connects it to the biblical account in Daniel 6:4, where his enemies could find no fault in him.
"***** At this time God's cause is in need of men and women who possess rare qualifications and good administrative powers; men and women who will make patient, thorough investigation of the needs of the work in various fields; those who have a large capacity for work; those who possess warm, kind hearts, cool heads, sound sense, and unbiased judgment; those who are sanctified by the Spirit of God, and can fearlessly say No, or Yea and amen, to propositions; those who have strong convictions, clear understanding, and pure, sympathetic hearts; those who practice the words, “All ye are brethren;” [ Matthew 23:8 .] those who strive to uplift and restore fallen humanity.— Testimonies for the Church 7:246-249 . GW 424.2"
"But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren."
Ellen White directly references Matthew 23:8 in this passage.