"I saw that many are fair in their profession, while within is corruption. Deceive not yourselves, falsehearted professors. God looks at the heart. “Out of the abundance of the heart the mouth speaketh.” The world, I saw, is in the heart of such, but the religion of Jesus is not there. If professed Christians love Jesus better than the world, they will love to speak of Him, their best Friend, in whom their highest affections are centered. He came to their aid when they felt their lost and perishing condition. When weary and heavy-laden with sin, they turned unto Him. He removed their burden of guilt and sin, took away their sorrow and mourning, and turned the whole current of their affections. The things they once loved, they now hate; and the things they hated, they now love. 1T 159.2"
"O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh."
EGW directly quotes 'Out of the abundance of the heart the mouth speaketh,' which is a direct quote from Matthew 12:34.
"But the Lord said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the Lord seeth not as man seeth; for man looketh on the outward appearance, but the Lord looketh on the heart."
Both passages emphasize that God judges based on the inner heart, not outward appearance. EGW's statement that 'God looks at the heart' directly echoes the principle in 1 Samuel 16:7.
"Come unto me, all ye that labour and are heavy laden, and I will give you rest."
The EGW passage directly quotes Matthew 12:34 ("“Out of the abundance of the heart the mouth speaketh.”"), and alludes to Matthew 11:28 by describing the experience of coming to Jesus when "weary and heavy-laden with sin." The passage amplifies the idea of inner transformation and its outward manifestation, which is a direct principle derived from the biblical text.
"For where your treasure is, there will your heart be also."
EGW's statement that 'the world...is in the heart of such, but the religion of Jesus is not there' connects to the idea that where your treasure is, there your heart will be also. If someone's treasure is the world, their heart is not centered on Jesus.