"God proves His people in this world. This is the fitting-up place to appear in His presence. Here, in this world, in these last days, persons will show what power affects their hearts and controls their actions. If it is the power of divine truth, it will lead to good works. It will elevate the receiver, and make him noblehearted and generous, like his divine Lord. But if evil angels control the heart, it will be seen in various ways. The fruit will be selfishness, covetousness, pride, and evil passions. 1T 188.1"
"Wherefore by their fruits ye shall know them."
The EGW passage directly echoes the principle of judging by fruits, elaborating on the types of fruits produced by different influences.
"But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, Meekness, temperance: against such there is no law."
The EGW passage contrasts the fruits of divine truth with the fruits of evil angels, mirroring the contrast between the fruit of the Spirit and the works of the flesh in Galatians 5. While not a direct quote, the thematic parallel is strong and meaningful.
"That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:"
Both passages discuss the testing/proving of faith and character, although the specific context and imagery differ. The connection is present but not as strong as a direct allusion.
The heart is deceitful above all things, and desperately wicked. Professors of religion are not willing to closely examine themselves to see whether they are in the faith; and it is a fearful fact that many are leaning on a false hope. Some lean upon an old experience which they had years ago; but when brought down to this heart- searching time, when all should have a daily experience, they have nothing to relate. They seem to think that a profession of the truth will save them. When they subdue those sins which God hates, Jesus will come in and sup with them and they with Him. They will then draw divine strength from Jesus, and will grow up in Him, and be able with holy triumph to say: “Thanks be to God, which giveth us the victory through our Lord Jesus Christ.” It would be more pleasing to the Lord if lukewarm professors of religion had never named His name. They are a continual weight to those who would be faithful followers of Jesus. They are a stumbling block to unbelievers, and …
"The heart is deceitful above all things, and desperately wicked: who can know it?"
The EGW passage directly quotes Jeremiah 17:9, "The heart is deceitful above all things, and desperately wicked," and uses it as a basis for her argument about the need for self-examination.
I was shown that the people of God should not imitate the fashions of the world. Some have done this, and are fast losing the peculiar, holy character which should distinguish them as God's people. I was pointed back to God's ancient people, and was led to compare their apparel with the mode of dress in these last days. What a difference! what a change! Then the women were not so bold as now. When they went in public, they covered their faces with a veil. In these last days, fashions are shameful and immodest. They are noticed in prophecy. They were first brought in by a class over whom Satan has entire control, who, “being past feeling [without any conviction of the Spirit of God] have given themselves over unto lasciviousness, to work all uncleanness with greediness.” If God's professed people had not greatly departed from Him, there would now be a marked difference between their dress and that of the world. The small bonnets, exposing the face and head, show a lack of modesty. The h…
"And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God."
EGW directly applies the principle of not conforming to the world (Romans 12:2) to the specific issue of fashion and dress. She argues that God's people should maintain a distinct and holy character, which includes avoiding worldly fashions.