"The heavenly visitant bade the waiting messenger, “Go, and tell this people, PK 308.1"
"And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not."
EGW directly quotes the beginning of Isaiah 6:9.
"“Hear ye indeed, but understand not; And see ye indeed, but perceive not. Make the heart of this people fat, And make their ears heavy, and shut their eyes; Lest they see with their eyes, and hear with their ears, And understand with their heart, And convert, and be healed.” Verses 9, 10 . PK 308.2"
"And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not."
EGW quotes Isaiah 6:9 and 6:10 directly.
"The prophet's duty was plain; he was to lift his voice in protest against the prevailing evils. But he dreaded to undertake the work without some assurance of hope. “Lord, how long?” he inquired. Verse 11 . Are none of Thy chosen people ever to understand and repent and be healed? PK 308.3"
"Then said I, Lord, how long? And he answered, Until the cities be wasted without inhabitant, and the houses without man, and the land be utterly desolate,"
The EGW passage directly quotes and references Isaiah 6:11, demonstrating a clear and explicit allusion. The context provided by EGW further clarifies the prophet's concern and the nature of his question to God.
"His burden of soul in behalf of erring Judah was not to be borne in vain. His mission was not to be wholly fruitless. Yet the evils that had been multiplying for many generations could not be removed in his day. Throughout his lifetime he must be a patient, courageous teacher—a prophet of hope as well as of doom. The divine purpose finally accomplished, the full fruitage of his efforts, and of the labors of all God's faithful messengers, would appear. A remnant should be saved. That this might be brought about, the messages of warning and entreaty were to be delivered to the rebellious nation, the Lord declared: PK 308.4"
"Esaias also crieth concerning Israel, Though the number of the children of Israel be as the sand of the sea, a remnant shall be saved:"
The EGW passage directly references the concept of 'a remnant shall be saved,' which is a clear and direct allusion to Romans 9:27, which itself quotes Isaiah. The context of Isaiah's prophecy concerning Israel is also relevant.
"But yet in it shall be a tenth, and it shall return, and shall be eaten: as a teil tree, and as an oak, whose substance is in them, when they cast their leaves: so the holy seed shall be the substance thereof."
Both passages speak of a remnant being saved after a period of destruction and judgment. EGW's passage directly references the idea of a remnant being saved, which aligns with the concept presented in Isaiah 6:13, where a tenth will return. While not a direct quote, the thematic connection is strong.