"The Grace of Courtesy Those who work for Christ are to be upright and trustworthy, firm as a rock to principle, and at the same time kind and courteous. Courtesy is one of the graces of the Spirit. To deal with human minds is the greatest work ever given to man; and he who would find access to hearts must heed the injunction, “Be pitiful, be courteous.” [ 1 Peter 3:8 .] Love will do that which argument will fail to accomplish. But a moment's petulance, a single gruff answer, a lack of Christian politeness and courtesy in some small matter, may result in the loss of both friends and influence. GW 121"
"Finally, be ye all of one mind, having compassion one of another, love as brethren, be pitiful, be courteous:"
Ellen White directly references 1 Peter 3:8 in this passage.