"Chapter 27—Deportment “Love...doth not behave itself unseemly.” The value of courtesy is too little appreciated. Many who are kind at heart lack kindliness of manner. Many who command respect by their sincerity and uprightness are sadly deficient in geniality. This lack mars their own happiness and detracts from their service to others. Many of life's sweetest and most helpful experiences are, often for mere want of thought, sacrificed by the uncourteous. Ed 240"
"Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil;"
EGW directly quotes 1 Corinthians 13:5 ('doth not behave itself unseemly') and then elaborates on the importance of courtesy and its impact on relationships. This is a clear and direct allusion.
"teaches self-respect, respect for the dignity of man as man, a regard for every member of the great human brotherhood. Ed 240.3"
"And the second is like unto it, Thou shalt love thy neighbour as thyself."
EGW's statement about self-respect and respect for others directly reflects the principle of loving your neighbor as yourself, as taught in Matthew 22:39.