"Foreign Languages There are among us those who, without the toil and delay of learning a foreign language, might qualify themselves to proclaim the truth to other nations. In the primitive church, missionaries were miraculously endowed with a knowledge of the languages in which they were called to preach the unsearchable riches of Christ. And if God was willing thus to help His servants then, can we doubt that His blessing will rest upon our efforts to qualify those who naturally possess a knowledge of foreign tongues, and who, with proper encouragement, would bear to their own countrymen the knowledge of truth? We might have had more laborers in foreign missionary fields had those who entered these fields availed themselves of every talent within their reach.... CT 515"
"And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance."
EGW directly references the miraculous gift of tongues in the primitive church, as described in Acts 2:4, and uses it as a point of comparison for encouraging the use of existing language skills for missionary work.
"Hundreds of young men should have been preparing to act a part in the work of scattering the seeds of truth beside all waters. We want men who will push the triumphs of the cross; men who will persevere under discouragements and privations; who will have the zeal and resolution and faith that are indispensable in the missionary field.... CT 515.1"
"In the morning sow thy seed, and in the evening withhold not thine hand: for thou knowest not whether shall prosper, either this or that, or whether they both shall be alike good."
EGW uses the phrase 'scattering the seeds of truth beside all waters,' which is a clear allusion to Ecclesiastes 11:6, emphasizing the importance of consistent effort in spreading the gospel.