What is Jesus talking about: the kingdom of heaven is like leaven

• Why would Jesus use yeast, understood as a corruption agent, to describe the kingdom of heaven?
• Have you seen the leaven-like spread of the gospel in your own community or yourself?

A host frames the week's question from Matthew 13:33: the kingdom of heaven is like leaven a woman hid in three measures of flour, though yeast was understood in that culture as a corruption agent, especially around unleavened bread. Ben, addressed by name in the audio, argues the point is transformation: the yeast pervades and changes the whole substance into something different, which also reframes 'beware the yeast of the Pharisees'. Mike, addressed by name, emphasizes how a little leaven spreads and takes over, comparing it to a virus. The hosts riff on 'Jesus cooties' — Jesus' influence is stronger than sin's, so Christians should spread it rather than hide — and discuss the Passover purity context, the parable of the sower and proper soil, and Paul's Romans/Galatians argument that God's people themselves have been changed. The follow-up question is whether they have seen this leaven-like work in their own communities: one host cites small conversations God multiplied, another notes the work is slow, like church attendance growing through friends of friends. The bit closes with jokes about the 'yeast of the crazies' and a man's Illuminati tattoo.