I will not answer every one of your posts. I will give one answer that pretty much should satisfy your overall theme.
In the middle of His discourse to His disciples on end time events Jesus stops and tells two parables, The parable of the 10 virgins and the parable of the talents. Why?
He tells more than two parables. And the parables fit the discourse. Starting in 24:36:
Matthew 2436 “But of that day and hour no one knows, not even the angels of heaven, but My Father only.
He indicates no man knows that day and hour. Had the Millerites followed this there would be no Millerite message of Jesus coming in 1843/44 and eventually October 22, 1844.
He then applies this further:
Matthew 24:37 But as the days of Noah were, so also will the coming of the Son of Man be. 38 For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, 39 and did not know until the flood came and took them all away, so also will the coming of the Son of Man be. 40 Then two men will be in the field: one will be taken and the other left. 41 Two women will be grinding at the mill: one will be taken and the other left. 42 Watch therefore, for you do not know what hour your Lord is coming.
You don't know when the Lord will come. It will happen when people are not aware.
Matthew 24:43 But know this, that if the master of the house had known what hour the thief would come, he would have watched and not allowed his house to be broken into. 44 Therefore you also be ready, for the Son of Man is coming at an hour you do not expect.
Since you don't know when the Lord is coming you must be ready.
Matthew 24:45 “Who then is a faithful and wise servant, whom his master made ruler over his household, to give them food in due season? 46 Blessed is that servant whom his master, when he comes, will find so doing. 47 Assuredly, I say to you that he will make him ruler over all his goods. 48 But if that evil servant says in his heart, ‘My master is delaying his coming,’ 49 and begins to beat his fellow servants, and to eat and drink with the drunkards, 50 the master of that servant will come on a day when he is not looking for him and at an hour that he is not aware of, 51 and will cut him in two and appoint him his portion with the hypocrites. There shall be weeping and gnashing of teeth.
The servant who is faithful will be rewarded by the Master. The evil servant will not be found ready, and the Lord will come at a time he is not aware of, and when he is not looking for him. This servant is cut in two and shares the fate of the hypocrites.
So we have direct teaching indicating the time of the Lord's coming is not known. And we have two parables that warn to be ready. It is with that in mind we encounter the two parables that you mention.
Matthew 25:1 “Then the kingdom of heaven shall be likened to ten virgins who took their lamps and went out to meet the bridegroom. 2 Now five of them were wise, and five were foolish. 3 Those who were foolish took their lamps and took no oil with them, 4 but the wise took oil in their vessels with their lamps. 5 But while the bridegroom was delayed, they all slumbered and slept. 6 “And at midnight a cry was heard: ‘Behold, the bridegroom is coming; go out to meet him!’ 7 Then all those virgins arose and trimmed their lamps. 8 And the foolish said to the wise, ‘Give us some of your oil, for our lamps are going out.’ 9 But the wise answered, saying, ‘No, lest there should not be enough for us and you; but go rather to those who sell, and buy for yourselves.’ 10 And while they went to buy, the bridegroom came, and those who were ready went in with him to the wedding; and the door was shut. 11 “Afterward the other virgins came also, saying, ‘Lord, Lord, open to us!’ 12 But he answered and said, ‘Assuredly, I say to you, I do not know you.’ 13 “Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.
The last line ties this to the other parables, and gives the point. The foolish virgins, like the previous servant, were not ready. They did not know the time of Jesus' coming, and were shut out.
We have to be ready and doing what the Lord said at all times. We do not know when He will come. This was reiterated throughout the passage. Miller stated Jesus was coming in 1843, 1844, and eventually settling on Oct. 22, 1844. That message went completely against this whole section. You are not ready by knowing the hour. Because Jesus said expressly you will not know the hour. The timing of Jesus' coming is not known. You have to be ready.
The parable of the talents again emphasizes doing what the Lord asked. They are to be ready.
To what purpose did Jesus tell this? And what does it mean that 5 of the virgins took enough oil to last and 5 didn't? This obviously takes place before the second coming as when Jesus comes the second time He comes with everu man's reward. Why does He tell the 5 foolish virgins He doesn't know them? God's church is a;ways referred to as a virgin in prophecy so these 10 virgins were obviously His followers. Oil is represented as the HS.
So 5 virgins had enough of the HS to be represented as wise and the rest did not. The 5 foolish virgins were locked out of heaven as Jesus told them He didn't know them.
The passage means what Jesus says it does. He states the point clearly:
Matthew 25:13 “Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.
You have to be ready. It is the same theme throughout the passage.
So not knowing God, personally, is fatal to our chances of heaven. This is where righteousness by faith comes in.
Certainly not having faith in Christ is fatal. The parable is explained. We do not know when Jesus is coming (Miller should have seen this all around the passage), and so we must always be ready, and be doing what He entrusted us to do.
This parable is the explanation of the investigative judgement now going on in heaven. No other explanation fits.
Sorry but Jesus stated the point plainly. So I am going with what He stated rather than your interpretation reading in later Adventist doctrine. The five foolish virgins were not ready when He came.
Moreover, Miller's message was not the investigative judgment. And the investigative judgment developed gradually over time in the Adventist church, being largely accepted by the 1850's. We see James White for instance rejecting it prior. A version of the investigative judgment had been suggested by a Millerite, but with some different details, and was not the message of the Millerite movement.
So this does not speak to the problem the thread presents. Miller preached Jesus would return to earth in 1843, and 1844, and eventually settled on October 22, 1844 (though this last was not Miller's idea, but he did eventually accept it as well). That was the message that was given. And it was a false, time-setting message that rejected the words of Christ. It did not come to pass.
As to the missed time every denomination at that time believed the sanctuary was the earth.
Ellen White said this,
Great Controversy, chapter 23
"In common with the rest of the Christian world, Adventists then held that the earth, or some portion of it, was the sanctuary."
But this is demonstrably untrue. Here are just a few commentators from the time leading up to 1844 that did in fact know where the sanctuary was. And the reason they knew was because they had read the book of Hebrews.
Matthew Henry:
Hebrews 9, Henry's Complete Commentary on the Bible, One of over 125 Bible commentaries freely available, this commentary, filling six volumes, provides an exhaustive look at every verse in the Bible.
www.studylight.org
Christ, our high priest, has entered into heaven, not as their high priest entered into the holiest, with the blood of bulls and of goats, but by his own blood, typified by theirs, and infinitely more precious. And this,
Not for one year only, which showed the imperfection of that priesthood, that it did but typically obtain a year's reprieve or pardon. But our high priest entered into heaven once for all, and has obtained not a yearly respite, but eternal redemption, and so needs not to make an annual entrance.
Robert Haldane:
Hebrews 9, Haldane's Exposition on the Epistle to the Romans and Hebrews, One of over 125 Bible commentaries freely available, this commentary is one of the most respected interdenominational commentaries ever written.
www.studylight.org
He is set at the right hand of the majesty in the heavens.
Hebrews 8:1. This is the sanctuary of which He is minister. This is the true tabernacle into which He has entered by His own blood.
Albert Barnes:
Hebrews 9, Barnes' Notes on the Whole Bible, One of over 125 Bible commentaries freely available, this commentary by Albert Barnes, a dedicated student of the Bible, continues to be very popular even today.
www.studylight.org
By a greater and more perfect tabernacle - The meaning is, that Christ officiated as high priest in a much more magnificent and perfect temple than either the tabernacle or the temple under the old dispensation. He performed the great functions of his priestly office - the sprinkling of the blood of the atonement - in heaven itself, of which the most holy place in the tabernacle was but the emblem.