"The coming of Christ is near and hasteth greatly. The time in which to labor is short, and men and women are perishing. Said the angel: “Should not the men who have had great light co-operate with Him who sent His Son to the world to give light and salvation to men?” Shall men who have received the knowledge of the truth line upon line, precept upon precept, here a little and there a little, show but little appreciation of Him who came to the earth that His divine power might be the heritage of every believing soul? It was thus that the divinity of Christ was to become effectual in the salvation of the race, and the intercession of our great High Priest avail before the throne of God. The plan was devised in heaven. Shall those who have been bought with such a price fail of appreciating the great salvation? 9T 105.1"
"For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:"
The EGW passage directly quotes and applies the phrase "line upon line, precept upon precept, here a little and there a little" from Isaiah 28:10, making it a clear and intentional allusion.