"Put off all manifestations of self-importance, for this can be no help to you in your work; and yet I beseech you to place a high estimate upon your own character, for you are bought with an infinite price. Be careful, be prayerful, be serious. Do not feel that you can mingle the common with the sacred. This has been done so continually in the past that the spiritual discernment of teachers has been obscured, and they cannot distinguish between the sacred and the common. They have taken common fire and have exalted and praised and cherished it, and the Lord has turned away in displeasure. Teachers, will it not be better to make a full consecration of yourselves to God? Will you imperil your souls by a divided service? 6T 159.1"
"For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s."
EGW directly references the concept of being bought with a price and applies it to the need for teachers to consecrate themselves fully to God, echoing the sentiment in 1 Corinthians 6:20.
"By pen and voice give due honor to God. Sanctify the Lord God in your hearts and be ready always to give to every man that asks you a reason of the hope that is in you with meekness and fear. Will the teachers in our schools understand this? Will they take the word of God as the lessonbook able to make them wise unto salvation? Will they impart this higher wisdom to students, giving them clear and accurate ideas of truth, that they may be able to present these ideas to others? It may seem that the teaching of God's word has but little effect upon many minds and hearts; but if the teacher's work has been wrought in God, some lessons of divine truth will linger in the memory of even the most careless. The Holy Spirit will water the seed sown, and often it will spring up after many days and bear fruit to the glory of God. 6T 159.2"
"But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:"
EGW directly quotes and expands upon 1 Peter 3:15, urging teachers to be ready to give a reason for their hope with meekness and fear.
"great authors. He says: “Come unto Me.... Learn of Me; ... and ye shall find rest unto your souls.” Matthew 11:28, 29 . Christ has promised, and in learning lessons of Him we shall find rest. All the treasures of heaven were committed to Him that He might give these gifts to the diligent, persevering seeker. He is of God made unto us “wisdom, and righteousness, and sanctification, and redemption.” 1 Corinthians 1:30 . 6T 159.3"
"But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption:"
Ellen White directly references 1 Corinthians 1:30 in this passage.