1. The Holy Spirit indicating this, that the way into the Holiest of All was not yet made manifest while the first tabernacle was still standing. (Heb 9:8)
    Heb 10:19-20, Jn 14:6, Mt 27:50-51, Mk 15:37-38, Lk 23:45-46

Heb 9:8 The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing:

By tearing the veil, which is his body, and completing the work of Christ, Jesus opened the way to the sanctuary. (Heb 10:19, Mt 27:50-51, Mk 15:37-38, Lk 23:45-46, Jn 14:6)

Heb 10:19 Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus,

Mt 27:50 Jesus, when he had cried again with a loud voice, yielded up the ghost.
51 And, behold, the veil of the temple was rent in twain from the top to the bottom; and the earth did quake, and the rocks rent;

Mk 15:37 And Jesus cried with a loud voice, and gave up the ghost.
38 And the veil of the temple was rent in twain from the top to the bottom.

Lk 23:45 And the sun was darkened, and the veil of the temple was rent in the midst.
46 And when Jesus had cried with a loud voice, he said, Father, into thy hands I commend my spirit: and having said thus, he gave up the ghost.

Jn 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.