"Just before His crucifixion the Saviour said to His disciples: “I will not leave you comfortless.” “I will pray the Father, and He shall give you another Comforter, that He may abide with you forever.” “When He, the Spirit of truth, is come, He will guide you into all truth: for He shall not speak of Himself; but whatsoever He shall hear, that shall He speak: and He will show you things to come.” “He shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.” John 14:18, 16 ; 16:13 ; John 14:26 . 8T 19.2"
"But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you."
Ellen White directly references John 14:26 in this passage.
"But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you."
EGW's statement about laboring for the enlargement of God's kingdom directly reflects the principle in Matthew 6:33 to seek first the kingdom of God.