How may one know that this does not refer to the earthly sanctuary ?

Answer

"He said unto me, Understand, 0 son of man: for at the time of the end shall be the vision." Verse 17.
NOTE - The prophetic period Of 2300, days (years) extends to AD. 1844, while the divinely appointed
services of the earthly sanctuary ceased at the cross (Dan. 9:27; Matt. 27:50,51), and the sanctuary itself
was destroyed in AD. 70, when Titus captured Jerusalem. For explanation of the period here mentioned,
see the preceding reading.

What was offered Christ at His crucifixion?
When David confessed his sin, what did he say God did?
Why did Israel fail to attain unto righteousness?
What were these gifts that Christ gave to men?
What did the Apostle Paul say the \"man of sin\" would do?
With what are we to comfort one another?
What will be one characteristic of latter day apostasies?

Questions & Answers are from the book Bible Readings for the Home Circle