Once a batch of bread has been mixed with the leaven , there are two ways in which the system can be perpetuated.
A little leaven certainly has the power to affect the whole lump.
Being in the world, the Christian acts within the culture as a leaven , trying to transform it by communicating to others the redemption brought by Christ.
And here, unlike in his previous shows, there is not enough humour or anger to leaven the piece, which takes its own philosophical possibilities just a little too seriously.
Air bubbles can also be trapped in beaten egg whites, a technique used to leaven angel food or sponge cakes.
It works like a leaven of forgiveness and nonviolence in a culture prone to revenge and retribution.
I also was impressed by the amount of humor Washington uses to leaven the heavy material, giving every little character a realistic quirk and cutting judiciously on the funny lines to keep the timing solid.
It is an accomplished film that uses dark humor to leaven its serious topics.
Once active, even a small amount of leaven will be able to convert a very large quantity of new flour and water into fresh leaven overnight.
For the next two weeks the schedules will be Olympics wall-to-wall, so I'm guessing that come next Friday we will all be gagging for a bit of inspired fiction to leaven the diet of real-life heartbreak and triumph.