In T. S. Eliot's poem The Journey of the Magi he's offering a imaginative view into the interior experience of one of the wise men from the East who came to Jesus's birthplace.
The last few lines of that poem are:
We had evidence and no doubt. I had seen birth and death, But had thought they were different; this Birth was Hard and bitter agony for us, like Death, our death. We returned to our places, these Kingdoms, But no longer at ease here, in the old dispensation, With an alien people clutching their gods. I should be glad of another death.
What does he mean by old dispensation here? Does this come from the Bible (I can't find it there)? Does it come from church history?