"The Lord saw your dangers and time and again sent you warnings through the Testimonies that your eternal interests were endangered unless you overcame your love of self, and conformed your will to the will of God. Had you heeded the admonitions and warnings from the Lord, had you turned square about, made an entire change, your wife would not now be in the snare of the enemy, left of God to believe the strong delusions of Satan. Had you followed the light that God has given, you would now be a strong and efficient laborer in the cause of God, qualified to accomplish tenfold more than you are now competent to do. You have become weak because you have failed to cherish the light. You have been able but a small part of the time to discern the voice of the True Shepherd from that of a stranger. Your neglect to walk in the light has brought darkness upon you, and your conscience, by being often violated, has become benumbed. 3T 229.2"
"He, that being often reproved hardeneth his neck, shall suddenly be destroyed, and that without remedy."
The EGW passage speaks of repeated warnings being ignored, leading to negative consequences, which aligns with the proverb about hardening one's neck after repeated reproof leading to sudden destruction.