"the future, when, the warfare having been accomplished, the redeemed will enter into possession of the promised land. These visions of future glory, scenes pictured by the hand of God, should be dear to His church today, when the controversy of the ages is rapidly closing and the promised blessings are soon to be realized in all their fullness. PK 722.1"
"But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city."
Both passages refer to a future 'promised land' or 'better country' prepared by God for the redeemed. Hebrews 11:16 speaks of a heavenly city, while the EGW passage refers to visions of future glory and the realization of promised blessings. The connection is strong thematically.
"Many were the messages of comfort given the church by the prophets of old. “Comfort ye, comfort ye My people” ( Isaiah 40:1 ), was Isaiah's commission from God; and with the commission were given wonderful visions that have been the believers’ hope and joy through all the centuries that have followed. Despised of men, persecuted, forsaken, God's children in every age have nevertheless been sustained by His sure promises. By faith they have looked forward to the time when He will fulfill to His church the assurance, “I will make thee an eternal excellency, a joy of many generations.” Isaiah 60:15 . PK 722.2"
"Comfort ye, comfort ye my people, saith your God."
Ellen White directly references Isaiah 40:1 in this passage.
"Whereas thou hast been forsaken and hated, so that no man went through thee, I will make thee an eternal excellency, a joy of many generations."
Ellen White directly references Isaiah 60:15 in this passage.