"Heavenly messengers are sent to minister unto those who shall be heirs of salvation; and these would converse with the teachers if they were not so satisfied with the well-trodden path of tradition, if they were not so fearful of getting away from the shadow of the world. Teachers should beware lest they close the gates so that the Lord can find no entrance into the hearts of the youth. 6T 161.3"
"Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?"
Both passages discuss the ministry of angels to those who will inherit salvation. EGW applies this to the context of teachers and their potential to hinder or facilitate the work of these heavenly messengers in the lives of their students.