This temple was supported by seven pillars, all of transparent gold, set with pearls most glorious. The wonderful things I there saw I cannot describe. Oh, that I could talk in the language of Canaan, then could I tell a little of the glory of the better world. I saw there tables of stone in which the names of the 144,000 were engraved in letters of gold. After we beheld the glory of the temple, we went out, and Jesus left us and went to the city. Soon we heard His lovely voice again, saying, “Come, My people, you have come out of great tribulation, and done My will; suffered for Me; come in to supper, for I will gird Myself, and serve you.” We shouted, “Alleluia! glory!” and entered into the city. And I saw a table of pure silver; it was many miles in length, yet our eyes could extend over it. I saw the fruit of the tree of life, the manna, almonds, figs, pomegranates, grapes, and many other kinds of fruit. I asked Jesus to let me eat of the fruit. He said, “Not now. Those who eat of …
"Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God, which is new Jerusalem, which cometh down out of heaven from my God: and I will write upon him my new name."
The EGW passage describes a temple with pillars and mentions names being written, which echoes the imagery in Revelation 3:12 about being made a pillar and having God's name written on the overcomer. The confidence is adjusted slightly upwards because the pillar imagery is quite specific.
"And I heard the number of them which were sealed: and there were sealed an hundred and forty and four thousand of all the tribes of the children of Israel."
The EGW passage mentions tables of stone with the names of the 144,000 engraved, directly referencing the 144,000 mentioned in Revelation 7:4. The confidence is increased due to the direct reference to the 144,000.