When nearly precise rabbinic parallels to stories and sayings in the Gospels exist, it may indicate that the Gospels are preserving traditions of the early Jesus movement and, perhaps, the historical Jesus.
What is the relationship between the preaching of Jonah and putting a lamp on a lampstand? The prophet Jonah in classical Jewish thought calls to mind repentance. In Rabbinic literature we read that many prophets were sent to Jerusalem and the people did not listen, but to Nineveh one prophet was sent, and the people repented.
From the early centuries of the Christian era to our day, expositors of the Gospels have struggled with Jesus’ teachings on the Kingdom of Heaven, particularly with their temporal dimension. Will the Kingdom of Heaven appear one day in the future when the Son of Man suddenly comes? Or, has it been germinating like a seed with much potential for growth? Perhaps as C. H. Dodd suggested, it should be described as both realized and eschatological: germinal in reference to the past (and present), but explosive in regard to its coming manifestation.