Some of Jesus' confrontations with the Pharises. His talks with the disciples in private. Yet even within those somewhat literal events (like any history they probably aren't accurate down to the second--the Pharises ask Christ the question in one account, in the other account of the same event Christ asks them the question....it doesn't really matter as the answer is the same) Jesus spoke in (not exclusively, mind you) veiled, metaphorical language in many cases.
He explains remarriage is adultery which is quite literal, but when He mentions Eunichs being made by birth, choice, or other men that contains enough spiritual metaphor to write a ten page essay. The conversation took place. The disciples were shocked. And Jesus STILL threw a spiritual concept at them that NOBODY today even remotely gets. It is brilliant, really.