While you need to search out the leaven for Chag Motzi, I believe the L-RD teaches us as believers, that no amount of searching can find out every scrap of leaven in our lives. We still will miss crumbs, and that is what we NEED Him for. We can't do it alone, we were not created to do it alone. we need Him, and He provided that Lamb for us long ago.
Because this is a sin filled world it has much leaven in it.
Did you ever wonder why did G-d use leaven as a picture for sin?
Did you know that yeast is microscopic and lives everywhere? it is in the air we breath, it is what finds 'food' and then lives off it, causing it to decay ( 'death') it is the perfect picture of this fallen world.
Sin is every where and in every thing, sin is what brings death. When things have yeast, they fester and rot, which shows us what happens in the grave and in our spirit if we don't have the sinless one living within us.
Trying to get all the leaven out, even when we sweep our homes clean and disposed of every crumb, yeast is still in our homes, in our lives, in our bodies. It is in the air. Just looking for a host to attach onto and to bring rotting and death too.
Thank G-d we have Yeshua, and HE brings life!
Those thinking that they don't have yeast in something I will give an example.
Someone mentioned making their own pie crusts and how they had no yeast in them.
When you mix water with flour you create an environment that is welcoming to the yeast that is in the very air of your house.
If you do not bake the crust immediately ( within 18 minutes is set time) after mixing the water and flour ( and any other ingredient) then your pie crust has started to leaven, the yeast has settled in and is starting the fermentation process.
That is why matzah for Passover is baked under strict conditions, and not all matzah sold is to be used for Passover.
See how quick sin ( leaven ) can rise up and set in? that is the picture I think Messiah wants us to see as we commemorate each passover. and feast of unleavened bread.
He is the only thing that can save us from this leaven of sin that is everywhere and works so quickly.
Every year when I start the cleaning, I thank Him for His sacrifice, because It shows me more than any other example how much we truly NEED Him, and how inadequate we are without him, but with HIM we are conquerors of sin and death!
Halleluyah!!!