"“Then flew one of the seraphim unto me,” he writes, “having a live coal in his hand, which he had taken with the tongs from off the altar: and he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.” GW 22.2"
"Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar: And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged."
The EGW passage directly quotes Isaiah 6:6-7.
"Then Isaiah heard the voice of the Lord, saying, “Whom shall I send, and who will go for us?” and strengthened by the thought of the divine touch, he answered, “Here am I; send me.” GW 22.3"
"Also I heard the voice of the Lord, saying, Whom shall I send, and who will go for us? Then said I, Here am I; send me."
The EGW passage directly quotes Isaiah 6:8.
"As God's ministers look by faith into the holy of holies, and see the work of our great High Priest in the heavenly sanctuary, they realize that they are men of unclean lips, men whose tongues have often spoken vanity. Well may they despair as they contrast their own unworthiness with the perfection of Christ. With contrition of heart, feeling wholly unworthy and unfit for their great work, they cry,“I am undone.” But if, like Isaiah, they humble their hearts before God, the work done for the prophet will be performed for them. Their lips will be touched with a live coal from off the altar, and they will lose sight of self in a sense of the greatness and power of God and His readiness to help them. They will realize the sacredness of the work entrusted to them, and will be led to abhor everything that would cause them to dishonor Him who has sent them forth with His message. GW 22.4"
"Then said I, Woe is me! for I am undone; because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the Lord of hosts."
EGW directly references and interprets the Isaiah passage, even quoting "I am undone." The connection is explicit and central to her point.
"Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession."
The Hebrews verse speaks of Jesus as the High Priest, which is a key element in EGW's statement about ministers looking into the holy of holies. While not a direct quote or allusion, it supports the theological context.
"If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness."
EGW speaks of ministers feeling unworthy and needing cleansing. 1 John 1:9 offers a promise of cleansing through confession. The connection is thematic, relating to the need for purification and forgiveness.