"I was shown that if you had been walking in the light you would have taken your position decidedly for the truth. Your example would have shown that you considered the truth you profess of that importance that your affections and heart could go only where the image of Christ was discernible. Christ now says to you: Which will you have, Me or the world? Your decision is to be made here. Will you follow the promptings of an unsanctified heart, turn away from self-denial for Christ's sake, and step over the cross without lifting it? Or will you lift that cross, heavy though it may be, and make some sacrifice for the truth's sake? May God help you to see where you are, that you may place a true estimate upon eternal things. You now have so little spiritual eyesight that the holy and sacred are placed upon a level with the common. You have responsibilities. Your influence affects your sisters to a great extent. Your only safety is in separation from the world. 3T 41.1"
"Then said Jesus unto his disciples, If any man will come after me, let him deny himself, and take up his cross, and follow me."
EGW uses the language of 'taking up the cross' which is a clear reference to Matthew 16:24.
I was shown you, my brother, taking the young with you to scenes of amusement at the time of a religious interest, and also engaging in singing schools with worldlings who are all darkness and who have evil angels all around them. How does your feeble, dim light appear amid this darkness and temptation? Angels of God do not attend you upon these occasions. You are left to go in your own strength. Satan is well pleased with your position; for he can make you more efficient in his service than if you did not profess to be a Christian keeping all the commandments of God. The True Witness addresses the Laodicean church: “I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot. So then because thou art lukewarm, and neither cold nor hot, I will spew thee out of my mouth. Because thou sayest, I am rich, and increased with goods, and have need of nothing; and knowest not that thou art wretched, and miserable, and poor, and blind, and naked: I counsel thee to buy of…
"Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?"
The EGW passage warns against associating with worldlings and engaging in worldly amusements, highlighting the incompatibility of light and darkness, which aligns with the principle in 2 Corinthians 6:14.