It doesnt mean what you think it means
Short story.
In the Bible when you read the account of the Last Supper, the Passover Meal, only three cups of wine were consumed. In Jewish Tradition, 4 cups had to be drunk or the ceremony was incomplete. (The Lamb also had to be eaten.)
Jesus also said the fruit of the vine shall not pass my lips....
The fourth cup was never drunk at the passover meal, the meal was not yet finished.
On the Cross, Jesus said “I thirst”. (Scott Hahn gets into how unlikely that is for various reasons, medical and otherwise.)
At that time, Jesus was given Wine. Sour Wine, but wine none the less, the fourth “cup”. After Jesus drank, He said, it is finished. These words according to Hahn refer to the passover meal.
http://www.star.ucl.ac.uk/~vgg/rc/aplgtc/hahn/m4/4cp.html
thought you were done posting to either of us?
Nope.
Take care.
Hoss