"Help from Heaven The worker in a foreign field must carry in his heart the peace and love of heaven; for this is his only safety. Amid perplexity and trial, discouragement and suffering, with the devotion of a martyr and the courage of a hero, he is to hold fast to the hand that never lets go, saying, “I will not fail nor be discouraged.” He must be a close Bible student, and should be often in prayer. If, before talking with others, he will seek help from above, he may be assured that angels of heaven will be with him. At times he may yearn for human sympathy, but in his loneliness he may find comfort and encouragement through communion with God. Let him be cheered by the words of the Saviour, “Lo, I am with you alway, even unto the end of the world.” [ Matthew 28:20 .] From this divine Companion he will receive instruction in the science of soul-saving. GW 469"
"Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen."
The EGW passage directly quotes Matthew 28:20, making it an explicit allusion.
"Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee."
Both passages offer reassurance of God's presence and support, particularly in challenging circumstances. The EGW passage echoes the sentiment of God not forsaking the worker in the foreign field, aligning with the promise in Hebrews 13:5.
"Energy and self-sacrifice are needed in the missionary field. God calls for men who will push the triumphs of the cross; men who will persevere under discouragements and privations; men who have the zeal and resolution and faith that are indispensable in the missionary field. By persevering toil and a firm trust in the God of Israel, resolute, courageous men will accomplish wonders. There is scarcely a limit to what may be achieved if the efforts made are governed by enlightened judgment and backed by earnest endeavor. GW 469.2"
"Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord."
Both passages emphasize steadfastness, perseverance, and diligence in the work of the Lord. The EGW passage applies this principle specifically to missionary work, while 1 Corinthians 15:58 offers a more general encouragement.