"After I came to Oakland I was weighted down with a sense of the condition of things at Battle Creek, and I, weak, powerless to help you. I knew that the leaven of unbelief was at work. Those who disregarded the plain injunctions of God's word were disregarding the testimonies which urged them to give heed to that word. While visiting Healdsburg last winter, I was much in prayer and burdened with anxiety and grief. But the Lord swept back the darkness at one time while I was in prayer, and a great light filled the room. An angel of God was by my side, and I seemed to be in Battle Creek. I was in your councils; I heard words uttered, I saw and heard things that, if God willed, I wish could be forever blotted from my memory. My soul was so wounded I knew not what to do or what to say. Some things I cannot mention. I was bidden to let no one know in regard to this, for much was yet to be developed. 5T 68.1"
"A little leaven leaveneth the whole lump."
The EGW passage uses the metaphor of 'leaven of unbelief' to describe a corrupting influence, mirroring the biblical verse's warning about the pervasive nature of leaven.
"I was told to gather up the light that had been given me and let its rays shine forth to God's people. I have been doing this in articles in the papers. I arose at three o'clock nearly every morning for months and gathered the different items written after the last two testimonies were given me in Battle Creek. I wrote out these matters and hurried them on to you; but I had neglected to take proper care of myself, and the result was that I sank under the burden; my writings were not all finished to reach you at the General Conference. 5T 68.2"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
EGW explicitly states she is gathering and shining light, directly mirroring the biblical call to let one's light shine.