"danger of being affected by the evil angels. It is when souls get above the Spirit of God, moving in their own strength, that the angels cease watching over them, and they are left to the buffetings of Satan. EW 116.1"
"For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places."
Both passages touch on the idea of spiritual warfare and the influence of evil spiritual forces. Ephesians 6:12 describes the nature of this warfare, while EGW describes how individuals become vulnerable to these forces when they rely on their own strength rather than the Spirit of God.
"Duties are laid down in God's Word, the performance of which will keep the people of God humble and separate from the world, and from backsliding, like the nominal churches. The washing of feet and partaking of the Lord's supper should be more frequently practiced. Jesus set us the example, and told us to do as He had done. I saw that His example should be as exactly followed as possible; yet brethren and sisters have not always moved as judiciously as they should in washing feet, and confusion has been caused. It should be introduced into new places with carefulness and wisdom, especially where the people are not informed relative to the example and teachings of our Lord on this point, and where they have prejudice against it. Many honest souls, through the influence of former teachers in whom they had confidence, are much prejudiced against this plain duty, and the subject should be introduced to them in a proper time and manner. EW 116.2"
"If I then, your Lord and Master, have washed your feet; ye also ought to wash one another’s feet. For I have given you an example, that ye should do as I have done to you. Verily, verily, I say unto you, The servant is not greater than his lord; neither he that is sent greater than he that sent him. If ye know these things, happy are ye if ye do them."
The EGW passage explicitly refers to the washing of feet and the Lord's Supper, directly referencing Jesus' example and command in John 13:14-17. It also discusses the importance of following His example and the potential for confusion if not introduced carefully.