What do Orthodox Jewish people do before Passover to remove leaven?
Before Passover, Orthodox Jewish people thoroughly clean their houses, searching from the basement to the attic for any semblance of leaven or yeast. This practice removes every trace of leaven from the home, serving as the illustration for purging out the old leaven so the whole lump is not leavened.
Les explains that before Passover, Orthodox Jewish people go through the house, from the basement to the attic, and thoroughly clean house, looking for any semblance of leaven or yeast. He connects this to the instruction to purge out the old leaven, which is causing the whole lump to be leavened. The analogy applies to the church: if open sin and gross sin are allowed, it will not be long until the congregation loses its testimony.