The reading of Daniel 7 led Adventists to see a movement by the Son of Man towards the Ancient of Days in the Most Holy Place. Why have Protestants not been able to see this movement and see the Biblical teaching of the Investigative Judgement? Why do many Adventists now deny this doctrine through either a denial of victory over sin in this life or an outright denial of the doctrtine completely.
In 1858 Ellen White published that God had laid a solid immovable platform of truth in the Advent movement and that God was the Master builder. See 1SG 169 or EW 258.
Since Jesus is the Truth and and no other foundation can be laid than Him (1 Cor 3:11) and He is the cornerstone of God's Church then how could the Adventist Church build a solid immovable platform when according to our church today, they believed the so called "heretical doctrine of Semi-arianism?" If our pioneers were wrong about the person of the Son of God, then the cornerstone of Adventism was not laid correctly. When God is the master builder and lays a cornerstone would he allow that stone to be laid wrongly? How could Ellen White be shown by God that the system of teaching held by Adventists were "solid" and immovable" if the central piece of the foundation was completely wrong?
The Biblical teaching of the Most Holy Place reveals that intercession for sin will end just before the Second Coming. The ability to maintain this belief depends completely upon the pedigree of your mediator. Is your mediator able to sanctify you completely, can He carry you all the way to the City above? Does your mediator truly mediate between the Father and Humanity? Within the Trinity, Jesus is both mediator and being mediated on behalf of and therefore the mediation is symbolic and metaphorical.