"I saw that you have felt strong in yourself, felt that you had arguments which could not be gainsaid, and you have not relied upon the strength of the Lord. You have too often rushed upon Satan's ground to meet an opponent. You have not waited until you knew that the truth or the cause of God demanded a discussion, but have engaged with opponents where with a little forethought you would have decided that the truth could not be advanced or the cause of God benefited. Precious time has thus been spent. 1T 428.1"
"Trust in the Lord with all thine heart; and lean not unto thine own understanding."
EGW's statement about relying on the Lord's strength rather than one's own arguments directly reflects the principle in Proverbs 3:5.
"Satan looked on and witnessed the heavy blow which Brother Hull dealt to spiritualism in Battle Creek. Spiritualists understood his organization, and felt assured it would not be in vain to make a determined effort to overthrow him who injured their cause so much. In discussing with spiritualists you have not merely to meet man and his arguments, but Satan and his angels. And never should one man be sent forth alone to combat with a spiritualist. If the cause of God really demands that we confront Satan and his host as represented by a spiritual medium, if enough is at stake to call for such a discussion, then several should go forth together that with prayer and faith the host of darkness may be driven back and the speaker shielded by angels that excel in strength. 1T 428.2"
"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."
The EGW passage directly references combating Satan and his angels, which is a clear echo of Ephesians 6:12's description of wrestling against spiritual wickedness.
Brother Hull, you were shown me under the soothing influence of a fascination which will prove fatal unless the spell is broken. You have parleyed with Satan, and reasoned with him, and tarried upon forbidden ground, and have exercised your mind in things which were too great for you, and by indulging in doubts and unbelief have attracted evil angels around you, and driven from you the pure and holy angels of God. If you had steadfastly resisted Satan's suggestions and sought strength from God with a determined effort, you would have broken every fetter, driven back your spiritual foe, come closer to God, and triumphed in His name. I saw that it was presumption in you to go forth to meet a spiritualist when you were yourself enshrouded and bewildered by clouds of unbelief. You went to battle with Satan and his host without an armor, and have been grievously wounded, and are insensible to your wound. I greatly fear that the thunders and lightnings of Sinai would fail to move you. You ar…
"Submit yourselves therefore to God. Resist the devil, and he will flee from you."
The EGW passage directly reflects the principle of resisting the devil as outlined in James 4:7. It speaks of resisting Satan's suggestions and seeking strength from God to overcome him.