Hebrews 9:8

that the way into the holiest … was not yet made manifest Entrance into the Holiest symbolised direct access to God, and the "way" into it had not been made evident until He came who is "the way, the truth, and the life" (John 14:6). He is "the new and living way" (Hebrews 10:19-20).

while as the first tabernacle was yet standing Rather, "while yet the outerTabernacle is still standing," i.e. so long as there is (for the Temple, which represented the continuity of the Tabernacle and the Old Covenant, had not sunk in flames, as it did a few years later) an outer Tabernacle, through which not even a Priest was ever allowed to enter into the Holiest. Hence the deep significance of the rending of the veil of the Temple from the top to the bottom at the Crucifixion. (Matthew 27:51).