"The Bible unfolds truth with a simplicity and an adaptation to the needs and longings of the human heart that has astonished and charmed the most highly cultivated minds, while to the humble and uncultured also it makes plain the way of life. “The wayfaring men, though fools, shall not err therein.” Isaiah 35:8 . No child need mistake the path. Not one trembling seeker need fail of walking in pure and holy light. Yet the most simply stated truths lay hold upon themes elevated, far-reaching, infinitely beyond the power of human comprehension, —mysteries that are the hiding of His glory, mysteries that overpower the mind in its research,—while they inspire the sincere seeker for truth with reverence and faith. The more we search the Bible, the deeper is our conviction that it is the word of the living God, and human reason bows before the majesty of divine revelation. Ed 170.3"
"And an highway shall be there, and a way, and it shall be called The way of holiness; the unclean shall not pass over it; but it shall be for those: the wayfaring men, though fools, shall not err therein."
Ellen White directly references Isaiah 35:8 in this passage.