"We should ever look upon the youth as the purchase of the blood of Christ. As such they have demands upon our love, our patience, and our sympathy. If we would follow Jesus we cannot restrict our interest and affection to ourselves and our own families; we cannot give our time and attention to temporal matters and forget the eternal interests of those around us. I have been shown that it is the result of our own selfishness that there are not one hundred young men where now there is one engaged in earnest labor for the salvation of their fellow men. “Love one another, as I have loved you,” is the command of Jesus. Look at His self-denial; behold the manner of love He has bestowed upon us; and then seek to imitate the Pattern. 5T 34.3"
"Beloved, if God so loved us, we ought also to love one another."
EGW directly quotes 'Love one another, as I have loved you' which is a paraphrase of John 13:34 and thematically linked to 1 John 4:11. The context of the passage also supports the connection.