"Today in every land there are those who are honest in heart, and upon these the light of heaven is shining. If they continue faithful in following that which they understand to be duty, they will be given increased light, until, like Naaman of old, they will be constrained to acknowledge that “there is no God in all the earth,” save the living God, the Creator. PK 253.1"
"If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself."
Both passages highlight the principle that obedience and faithfulness lead to increased understanding and knowledge of God's will. EGW states that those who faithfully follow what they understand to be duty will be given increased light, while John 7:17 states that those who do God's will shall know of the doctrine.
"That was the true Light, which lighteth every man that cometh into the world."
Both passages discuss light being given to people. EGW speaks of the 'light of heaven' shining on those honest in heart, while John 1:9 refers to the 'true Light' that lighteth every man. While not a direct quote, the concept of light representing divine truth and guidance connects the two.
"To every sincere soul “that walketh in darkness, and hath no light,” is given the invitation, “Let him trust in the name of the Lord, and stay upon his God.” “For since the beginning of the world men have not heard, nor perceived by the ear, neither hath the eye seen, O God, beside Thee, what He hath prepared for him that waiteth for Him. Thou meetest him that rejoiceth and worketh righteousness, those that remember Thee in Thy ways.” Isaiah 50:10 ; 64:4, 5 . PK 253.2"
"Who is among you that feareth the Lord, that obeyeth the voice of his servant, that walketh in darkness, and hath no light? let him trust in the name of the Lord, and stay upon his God."
EGW directly quotes Isaiah 50:10.
"But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him."
EGW alludes to the sentiment of 1 Corinthians 2:9, though she cites Isaiah 64:4,5. The core idea of God preparing unseen things for those who wait on Him is present in both.