This generation shall not pass!

What do you think the (anonymous) author of Mark (writing C A.D. 70 in Rome in a Roman dialect) meant by verse 30 in the thirteenth chapter?

To my mind, being words put in the mouth of a character who supposedly lived (and said the words) about 35 years previously, it’s pretty clear what the author intended: Vespasian Caesar was the “second coming” of the incarnation of YHWH known as “Christ Jesus”.

But what do you interpret it to mean?

Mark 13: 30

Verily I say unto you, that this generation shall not pass, till all these things be done.