"While we are exhorted not to forsake the assembling of ourselves together, these assemblies are not to be merely for our own refreshing. We are to be inspired with greater zeal to impart the consolation we have received. It is our duty to be very jealous for the glory of God and to bring no evil report, even by the sadness of the countenance or by ill-advised words, as if the requirements of God were a restriction upon our liberty. Even in this world of sorrow, disappointment, and sin the Lord desires us to be cheerful, and strong in His strength. The whole person is privileged to bear a decided testimony in every line. In features, in temper, in words, in character, we are to witness that the service of God is good. Thus we proclaim that “the law of the Lord is perfect, converting the soul.” Psalm 19:7 . 6T 365.1"
"The law of the Lord is perfect, converting the soul: the testimony of the Lord is sure, making wise the simple."
Ellen White directly references Psalms 19:7 in this passage.