"I will not leave you comfortless: I will come to you."
The EGW passage is a clear reference to John 14:18, though it only uses a fragment of the verse.
"The Saviour's commission to the disciples included all the believers. It includes all believers in Christ to the end of time. It is a fatal mistake to suppose that the work of saving souls depends alone on the ordained minister. All to whom the heavenly inspiration has come are put in trust with the gospel. All who receive the life of Christ are ordained to work for the salvation of their fellow men. For this work the church was established, and all who take upon themselves its sacred vows are thereby pledged to be co-workers with Christ. DA 822.2"
"Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:"
EGW's statement about the commission including all believers is a direct interpretation and application of the Great Commission in Matthew 28:19.
"But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:"
Both passages emphasize that believers are called to a specific purpose or role, and that they are to show forth God's praises.
"“The Spirit and the bride say, Come. And let him that heareth say, Come.” Revelation 22:17 . Everyone who hears is to repeat the invitation. Whatever one's calling in life, his first interest should be to win souls for Christ. He may not be able to speak to congregations, but he can work for individuals. To them he can communicate the instruction received from his Lord. Ministry does not consist alone in preaching. Those minister who relieve the sick and suffering, helping the needy, speaking words of comfort to the desponding and those of little faith. Nigh and afar off are souls weighed down by a sense of guilt. It is not hardship, toil, or poverty that degrades humanity. It is guilt, wrongdoing. This brings unrest and dissatisfaction. Christ would have His servants minister to sin-sick souls. DA 822.3"
"And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely."
EGW directly quotes Revelation 22:17 and then expands on its meaning and application.
"And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me."
The EGW passage discusses ministering to the needy and those weighed down by guilt, which aligns with the principle of serving others as if serving Christ, as expressed in Matthew 25:40.
The disciples were to begin their work where they were. The hardest and most unpromising field was not to be passed by. So every one of Christ's workers is to begin where he is. In our own families may be souls hungry for sympathy, starving for the bread of life. There may be children to be trained for Christ. There are heathen at our very doors. Let us do faithfully the work that is nearest. Then let our efforts be extended as far as God's hand may lead the way. The work of many may appear to be restricted by circumstances; but, wherever it is, if performed with faith and diligence it will be felt to the uttermost parts of the earth. Christ's work when upon earth appeared to be confined to a narrow field, but multitudes from all lands heard His message. God often uses the simplest means to accomplish the greatest results. It is His plan that every part of His work shall depend on every other part, as a wheel within a wheel, all acting in harmony. The humblest worker, moved by the Holy…
"But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judea, and in Samaria, and unto the uttermost part of the earth."
The EGW passage directly echoes the principle of starting where you are and expanding your efforts, as outlined in Acts 1:8 regarding witnessing in Jerusalem, Judea, Samaria, and to the uttermost parts of the earth.