"All may find something to do. None need feel that there is no place where they can labor for Christ. The Saviour identifies Himself with every child of humanity. That we might become members of the heavenly family, He became a member of the earthly family. He is the Son of man, and thus a brother to every son and daughter of Adam. His followers are not to feel themselves detached from the perishing world around them. They are a part of the great web of humanity, and heaven looks upon them as brothers to sinners as well as to saints. MH 104.3"
"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."
EGW's emphasis on Christ identifying with humanity and His followers being brothers to sinners directly parallels the sentiment in Matthew 25:40, where Jesus equates acts of kindness towards the 'least of these my brethren' as acts done to Himself.
"Millions upon millions of human beings, in sickness and ignorance and sin, have never so much as heard of Christ's love for them. Were our condition and theirs to be reversed, what would we desire them to do for us? All this, so far as lies in our power, we are to do for them. Christ's rule of life by which every one of us must stand or fall in the judgment is, “Whatsoever ye would that men should do to you, do ye even so to them.” Matthew 7:12 . MH 104.4"
"Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets."
Ellen White directly references Matthew 7:12 in this passage.