Why did Jesus speak in parables?

What a parable is

The English word comes from the Greek parabolē, “a throwing alongside”: one thing set beside another so you can compare them. Behind it stands the Hebrew mashal, a broader word that covers a proverb, a riddle, a taunt or a story. God tells Ezekiel to “tell a riddle, and speak a parable” (Ezekiel 17:2), and a psalm promises: “I will open my mouth in a parable. I will utter dark sayings of old” (Psalm 78:2). Matthew quotes that psalm to explain Jesus’s habit (Matthew 13:35).

Jesus’s parables are short and earthy: seed and soil, yeast and flour, a lost coin, a lost son, a debt, a wedding. Mark says this was his normal way of teaching crowds: “Without a parable he didn’t speak to them” (Mark 4:34).

A trap you walk into

The most famous mashal in the Hebrew Bible is a trap. King David has taken Bathsheba and arranged her husband’s death. The prophet Nathan comes to him with what sounds like a case for the king to judge: a rich man with huge flocks steals a poor man’s only lamb to feed a guest. David explodes. The man deserves to die!

Nathan said to David, “You are the man!”

A parable slips past your defenses. You give your verdict on the story, and only then see that you are in it. Jesus works the same way. When a lawyer asks, “Who is my neighbor?” (Luke 10:29), he tells of a Samaritan who stops on the Jericho road, and makes the lawyer answer his own question: the neighbor is “He who showed mercy on him” (Luke 10:37). In Jerusalem the chief priests get the point of one of his stories at once: “they perceived that he spoke the parable against them” (Mark 12:12).

Stories that hide

Mark adds a harder idea. After the parable of the sower, the disciples ask Jesus privately about the parables, and he answers with words from Isaiah’s call.

To you is given the mystery of God’s Kingdom, but to those who are outside, all things are done in parables, that ‘seeing they may see and not perceive, and hearing they may hear and not understand’

Isaiah had been warned that his preaching would harden his hearers (Isaiah 6:9–10). Read literally, Mark makes the parables a veil. Matthew softens the grammar: Jesus speaks in parables “because seeing they don’t see” (Matthew 13:13), as if the blindness came first. Readers have argued over these lines for centuries. Most agree on one thing: a parable does not hand over its meaning. It asks for a second look, and the ones who come back to ask get the explanation.

Ears to hear

That is why Jesus ends with a challenge rather than a moral: “Whoever has ears to hear, let him hear” (Mark 4:9). Mark says he taught “as they were able to hear it” and explained everything to his disciples in private (Mark 4:33–34). The British scholar C. H. Dodd, in 1935, described a parable as a picture from nature or common life, “leaving the mind in sufficient doubt about its precise application to tease it into active thought.”

The rabbis after Jesus told hundreds of parables, many of them about a king. Jesus’s stories have lasted because they leave work for the listener. The older brother of the prodigal son is still standing outside the party, and the reader has to decide whether he goes in. The sower, one of the few parables the Gospels decode line by line, is explained in What is the meaning of the parable of the sower?