"Brother G, if you had honestly followed the light, you would never have pursued the course you have taken. You have willfully, stubbornly followed your own course, and relied on your own judgment, refusing to be led. The Lord sent you help, but you refused to accept it. What more could heaven have done for you than has been done? When you have thought that others were more highly esteemed than yourself, you have felt dissatisfied and irritated, and have been pettish and distant like a spoiled child. You have wished to be highly esteemed, but have taken a course to greatly lower yourself in the estimation of those whose approbation you desire. 1T 311.2"
"Trust in the Lord with all thine heart; and lean not unto thine own understanding."
The EGW passage directly addresses the issue of relying on one's own judgment instead of following divine guidance, which is the core principle of Proverbs 3:5.
"Before your fanatical course you were jealous of those at Battle Creek, and have thrown out hints which would excite suspicion. You have been jealous of my husband and myself, and have surmised evil. Envy and suspicion have been united. Under an appearance of conscientiousness you have suggested doubts in regard to the movements of those who are bearing the burden of the work at Battle Creek, and have thrown out hints in regard to matters of which you were wholly ignorant, and utterly incapable of judging rightly. The burden of matters there was not laid upon you. I was shown that God would not select a person with a mind constituted like yours, and lay heavy burdens upon him, and call him to fill the most responsible positions; for self-esteem would be so prominent that it would be ruinous to himself and to God's people. Had you esteemed yourself less, you would have had less jealousy and suspicion. 1T 311.3"
"Let us not be desirous of vain glory, provoking one another, envying one another."
The EGW passage describes jealousy and envy, which are explicitly condemned in Galatians 5:26. The context of the EGW passage provides a specific example of the negative behaviors mentioned in the Bible verse.