"He who is the father of lies, blinds and deceives the world by sending forth his angels to speak for the apostles, and to make it appear that they contradict what they wrote by the dictation of the Holy Ghost when on earth. These lying angels make the apostles to corrupt their own teachings and to declare them to be adulterated. By so doing, Satan delights to throw professed Christians and all the world into uncertainty about the Word of God. That holy Book cuts directly across his track and thwarts his plans; therefore he leads men to doubt the divine origin of the Bible. Then he sets up the infidel Thomas Paine, as if when he died he were ushered into heaven, and now, united with the holy apostles whom he hated on earth, were engaged in teaching the world. EW 264.1"
"Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it."
EGW's description of Satan as the 'father of lies' who deceives the world directly alludes to John 8:44, where Jesus identifies the devil as a liar and the father of lies.
Satan assigns to each of his angels a part to act. He enjoins upon them all to be sly, artful, cunning. He instructs some of them to act the part of the apostles and to speak for them, while others are to act the part of infidels and wicked men who died cursing God, but now appear to be very religious. There is no difference made between the most holy apostles and the vilest infidels. They are both made to teach the same thing. It matters not whom Satan makes to speak, if his object is only accomplished. He was intimately connected with Paine upon earth, aiding him in his work, and it is an easy thing for him to know the very words and the handwriting of one who served him so faithfully and accomplished his purposes so well. Satan dictated much of Paine's writings, and it is an easy thing for him to dictate sentiments through his angels now, and make it appear that they come through Thomas Paine. This is the masterpiece of Satan. All this teaching, purporting to be from apostles and sa…
"And no marvel; for Satan himself is transformed into an angel of light."
Both passages discuss Satan's deceptive nature and his ability to disguise himself. 2 Corinthians 11:14 states that Satan transforms himself into an angel of light, while EGW describes Satan assigning roles to his angels to deceive people.