"The young are required in whatsoever they do, in word or deed, to do all in the name of the Lord Jesus, giving thanks to God and the Father by Him. I saw that but few of the youth understand what it is to be Christians, to be Christlike. They will have to learn the truths of God's word before they can conform their lives to the pattern. There is not one young person in twenty who has experienced in his life that separation from the world which the Lord requires of all who would become members of His family, children of the heavenly King. “Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you, and will be a Father unto you, and ye shall be My sons and daughters, saith the Lord Almighty.” 1T 510.1"
"Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,"
The EGW passage directly quotes 2 Corinthians 6:17.
"And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him."
The EGW passage directly references Colossians 3:17.
What a promise is here made upon condition of obedience! Do you have to cut loose from friends and relatives in deciding to obey the elevated truths of God's word? Take courage, God has made provision for you, His arms are open to receive you. Come out from among them and be separate, and touch not the unclean, and He will receive you. He promises to be a Father unto you. Oh, what a relationship is this! higher and holier than any earthly tie. If you make the sacrifice, if you have to forsake father, mother, sisters, brothers, wife, and children for Christ's sake, you will not be friendless. God adopts you into His family; you become members of the royal household, sons and daughters of the King who rules in the heaven of heavens. Can you desire a more exalted position than is here promised? Is not this enough? Said the angel: “What could God do for the children of men more than He has already done? If such love, such exalted promises are not appreciated, could He devise anything highe…
"And every one that hath forsaken houses, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my name’s sake, shall receive an hundredfold, and shall inherit everlasting life."
The EGW passage directly echoes the sentiment of forsaking earthly ties for Christ's sake and receiving a greater reward, as described in Matthew 19:29. It expands on the idea of God adopting those who make this sacrifice.