““After forty years had passed, an angel appeared to him in the wilderness of Mount Sinai, in the flame of a burning thorn bush. When Moses saw it, he marveled at the sight; and as he approached to look more closely, there came the voice of the Lord: ‘I am the God of your fathers, the God of Abraham and Isaac and Jacob.’ Moses shook with fear and would not venture to look. But the Lord said to him, ‘Take off the sandals from your feet, for the place on which you are standing is holy ground. I have certainly seen the oppression of My people in Egypt and have heard their groans, and I have come down to rescue them; come now, and I will send you to Egypt.’” – 7:30-34 NASB1995

“For seven days you shall make atonement for the altar and consecrate it; then the altar shall be most holy, and whatever touches the altar shall be holy.” — Exodus 29:37

“and the altar of burnt offering and all its utensils, and the laver and its stand. You shall also consecrate them, that they may be most holy; whatever touches them shall be holy.” — Exodus 30:28-29

That which touches that which is made holy by God is made holy. When God tells our hearts to remove our sandals, He is calling us to receive a holy anointing for His purposes.