Over and over, God reveals to people how they are to come to him. WHen they worship Him and bring their sacrifices, it is to be done with intensive preparation and intentionality. They were not to come to God's presence without the right preparations. In Exodus 34.20 God says "Don't show up empty-handed." Again and again there is a reminder we would not, should not, and better not come to God empty-handed. But we are often so lazy about our worship. We drag ourselves into worship on Sundays. We are empty handed and empty hearted. We have done nothing to prepare ourselves. We have not prepared our worship to be a pleasing aroma to God. Many or most Sundays we are lucky if we prepared anything at all.
Most Sundays we dray our apathetic hearts to worship and expect God to be overwhelmed by our valiant efforts put forth. "At least I showed up!"
My empty hearted worship is a joke and I am lucky I do not have to suffer the consequences the Israelites would have suffered for bringing such half-assed and empty-hearted sacrifice.
Later in Exodus 34, Moses is so close to God he gleams bright in the face. He has to wear a vail when he leaves God's presence, but every time he comes into God's presence he removes it.
When I come to God's presence, I want to be sure I admit and remove any blockages or hindrances my heart and mind have between me and God.
I have to remove my vail every time I come to worship him. I have to grow sick and tired with half-assed, empty-handed, and empty-hearted worship.