Jerusalem’s Crown Jewel

Why is it that I so often feel like kindof newborn after having learned a lecture? It feels as if I had known nothing before I learned this lecture. At any rate, I would like to add something to what the Rabbi said about the prohibition of making a replica of the Ark. I remember how G-d said, I don't remember where he said it in scripture, but he said (paraphrasing): " Do not drop this one! Because there won't be a second one!"