The preaching of the word is a means by which the Lord has ordained that His warning message shall be given to the world. In the Scriptures the faithful teacher is represented as a shepherd of the flock of God. He is to be respected and his work appreciated. Genuine medical missionary work is bound up with the ministry, and the canvassing work is to be a part both of the medical missionary work and of the ministry. To those who are engaged in this work I would say: As you visit the people, tell them that you are a gospel worker and that you love the Lord. 2TT 542.2
Do not seek a home in a hotel, but stay at a private house and become acquainted with the family. Christ was sowing the seeds of truth wherever He was, and as His followers you can witness for the Master, doing a most precious work in fireside labor. In thus coming close to the people you will often find those who are sick and discouraged. If you are pressing close to the side of Christ, wearing His yoke, you will daily learn of Him how to carry messages of peace and comfort to the sorrowing and disappointed, the sad and brokenhearted. You can point the discouraged ones to the word of God and take the sick to the Lord in prayer. As you pray, speak to Christ as you would to a trusted, much-loved friend. Maintain a sweet, free, pleasant dignity, as a child of God. This will be recognized. 2TT 542.3
Canvassers should be able to give instruction in regard to the treatment of the sick. They should learn the simple methods of hygienic treatment. Thus they may work as medical missionaries, ministering to the souls and the bodies of the suffering. This work should now be going forward in all parts of the world. Thus multitudes might be blessed by the prayers and instruction of God's servants. 2TT 543.1