FNN is a habit conservatives are breaking. Try OANN or or something that is mostly not leaven. Which is sin, sin includes lying. Lying includes leaving out the truth.
The parable describes what happens when a woman adds leaven (old, fermented dough[1] usually containing lactobacillus and yeast) to a large quantity of flour (about 8½ gallons or 38 litres[2]). The living organisms in the leaven grow overnight, so that by morning the entire quantity of dough has been affected.[1]