Michael Patella. The Gospel According to Luke: New Testament.
"The day of the Lord cannot be confined to the temporal cycle."(Page 33)
"The eschaton will not arrive without struggle. In order to sit at the banquet table in the kingdom of heaven, one must value it above any other facet of life, and acting on this value will be a struggle of WARLIKE PROPORTIONS. The banquet therefore becomes a metaphor for victory in the battle on behalf of God."(Page 100)
(Note: a clearly idealist view which makes the eschaton about nature rather than about time.)
"The reference to "this generation" (v.32) is ambiguous. In one sense, there is every reason to believe that many in the then contemporary generation would not pass away until after the First Jewish revolt. on the other hand, "if "all these things" refers to upheavals in nature ushering in the Son of Man, "this generation" is a timeless reference to the world; the eschaton, or end time, is ALWAY IMMINENT." (Page 183)
