If I may continue that quote…
Only the Prince may sit in it
to eat bread before the Lord;
He shall enter by way of the vestibule of the gate,
and shall go out the same way
“eat bread before the lord” does not quite make sense here, because he was not seated at the right hand of the father during his tenure here on Earth.
I feel that it is rather a prophecy regarding Jesus’ ascension into heaven, and his coming return at the end of days. Only Christ will “enter this gate”, the gate of the Kingdom of Heaven, preserved for him, upon his death. He will sit at the right hand of the father . And then, he will leave that gate of heaven when he returns and lays his judgment upon us.
In other words, the means by which Christ descended and ascended into heaven, via being immaculately conceived, and “rising on the third day”, will not be open to any other human being.