Since the Greek word "
genea" (generation), is derived from the Greek word "
genos" it's not a stretch, nor improbable that when Christ said, "this generation" He was speaking of all the seeds of Abraham, called Israel. Abraham's generation, offspring, kin, country men, same stock, both biological and supernatural are of the four generations of Noah and his three sons.
Abram was 100 years old when Isaac was born, and Isaac was 60 at the birth of his children, and Jacob 64 years of age at his marriage. But the word
dôr (Hebrew word translated 'generation' Gn 15:16) had probably come down from a remote antiquity, and, like the Latin word
seculum, signified a century. [A seculum is a
length of time roughly equal to the potential lifetime of a person or, equivalently, the complete renewal of a human population.]
Genesis 15:13 (KJV) And he said unto Abram, Know of a surety that thy seed shall be a stranger in a land
that is not theirs, and shall serve them; and they shall afflict them
four hundred years;
Genesis 15:16 (KJV) But in the
fourth generation (four centuries) they shall come hither again: for the iniquity of the Amorites
is not yet full.
γένος génos, ghen'-os
from
G1096; "kin" (abstract or concrete, literal or figurative, individual or collective):—born, country(-man), diversity,
generation, kind(-red), nation, offspring, stock.
My point being that Christ was not limiting "this generation" to only those of the first century. Christ is saying that the offspring of Abraham, both those who come through his natural/biological seeds, as well as those who come through his supernatural SEED (Christ) shall not cease to be a nation/offspring/stock/kindred, called Israel upon this earth till all these things be fulfilled. There shall be a nation called Israel to the end of the age when the last/seventh trumpet shall sound there will no longer be any delay, time shall be no longer.
Matthew 24:34 (KJV) Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
Where in the New Testament can we find a generation limited only to the people alive at the time of Christ?