"This test would reveal the strength of those who with real faith had obeyed what they believed to be the teaching of the word and the Spirit of God. It would teach them, as only such an experience could, the danger of accepting the theories and interpretations of men, instead of making the Bible its own interpreter. To the children of faith the perplexity and sorrow resulting from their error would work the needed correction. They would be led to a closer study of the prophetic word. They would be taught to examine more carefully the foundation of their faith, and to reject everything, however widely accepted by the Christian world, that was not founded upon the Scriptures of truth. GC 354.1"
"Prove all things; hold fast that which is good."
The passage emphasizes the importance of testing beliefs against the Word of God, similar to the call to 'prove all things' in 1 Thessalonians 5:21.
"With these believers, as with the first disciples, that which in the hour of trial seemed dark to their understanding would afterward be made plain. When they should see the “end of the Lord” they would know that, notwithstanding the trial resulting from their errors, His purposes of love toward them had been steadily fulfilling. They would learn by a blessed experience that He is “very pitiful, and of tender mercy;” that all His paths “are mercy and truth unto such as keep His covenant and His testimonies.” GC 354.2"
"All the paths of the Lord are mercy and truth unto such as keep his covenant and his testimonies."
EGW directly quotes Psalm 25:10, making it an explicit allusion.
"Behold, we count them happy which endure. Ye have heard of the patience of Job, and have seen the end of the Lord; that the Lord is very pitiful, and of tender mercy."
The EGW passage directly quotes and alludes to James 5:11, specifically mentioning 'the end of the Lord' and 'very pitiful, and of tender mercy.' This is a clear and intentional reference.