"So men have argued, till policy has taken the place of faithfulness. Sin is allowed to go unrebuked. When will be heard once more in the church the voice of faithful rebuke, “Thou art the man”? [See 2 Samuel 12:7 .] If these words were not so rare, we should see more of the power of God. The Lord's messengers should not complain of their efforts’ being fruitless until they repent of their love of approbation, their desire to please men, which leads them to suppress the truth, and to cry, Peace, when God has not spoken peace. GW 150.1"
"And Nathan said to David, Thou art the man. Thus saith the Lord God of Israel, I anointed thee king over Israel, and I delivered thee out of the hand of Saul;"
Ellen White directly references 2 Samuel 12:7 in this passage.
"human eye can see the path of the arrow of truth, who can say that the arrow has not sped to the mark, and pierced the souls of those who listened? Although no human ear has heard the cry of the wounded soul, yet the truth has silently cut its way to the heart. God has spoken to the soul; and in the day of final account, His faithful ministers will stand with the trophies of redeeming grace, to give honor to Christ. GW 150.4"
"For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart."
Both passages use the imagery of piercing or cutting to describe the effect of God's word on the soul. Hebrews 4:12 is a more direct and powerful statement, while EGW's passage elaborates on the unseen impact of truth. The connection is strong and meaningful.