“there was a man.” In the early chapters of Ezekiel, there is a supernatural “man” who is actually Yahweh (Ezek. 8:2). However, this “man” is not Yahweh but a supernatural being, most likely an angel. However, God Himself reenters the scene in the form of a man in Ezekiel 43:2 and takes Ezekiel into the inner court of the Temple (Ezek. 43:5) and begins to speak with Ezekiel (Ezek. 43:6).
“and he stood in the gate.” That is, the gate of the Millennial Temple. The opening of Ezekiel 40 can be confusing, and so the reader must pay close attention. Ezekiel was in captivity in Babylon when God took him in a vision to Israel. He saw the New Jerusalem on the south side of Mount Zion, but the angel was in the gate of the Temple, north of Jerusalem.