"In every effort to reach the higher classes, the worker for God needs strong faith. Appearances may seem forbidding, but in the darkest hour there is light above. The strength of those who love and serve God will be renewed day by day. The understanding of the Infinite is placed at their service, that in carrying out His purposes they may not err. Let these workers hold the beginning of their confidence firm unto the end, remembering that the light of God's truth is to shine amid the darkness that enshrouds our world. There is to be no despondency in connection with God's service. The faith of the consecrated worker is to stand every test brought to bear upon it. God is able and willing to bestow upon His servants all the strength they need and to give them the wisdom that their varied necessities demand. He will more than fulfill the highest expectations of those who put their trust in Him. AA 242.1"
"For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;"
EGW directly echoes the sentiment of holding confidence firm to the end, which is the core message of Hebrews 3:14.
"But they that wait upon the Lord shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint."
Both passages speak of renewed strength for those who trust in God. EGW expands on the idea of renewed strength in the context of serving God.
"The Lord is my light and my salvation; whom shall I fear? the Lord is the strength of my life; of whom shall I be afraid?"
Both passages connect God with light and strength. EGW expands on the idea of God as light in the context of a dark world and the strength He provides to His servants.