Charles Spurgeon Commentary Malachi 3:1

"Behold, I send my messenger, and he shall prepare the way before me: and the Lord, whom ye seek, will suddenly come to his temple; and the messenger of the covenant, whom ye desire, behold, he cometh, saith Jehovah of hosts." — Malachi 3:1 (ASV)

Behold, I will send my messenger, and he shall prepare the way before me:

The name Malachi means "my messenger." The reference here is, of course, to John the Baptist, who was to prepare the way of the Lord.

And the Lord, whom you seek, shall suddenly come to his temple,

Now, the temple at Jerusalem is utterly destroyed, so how can the Jews still think the Lord, whom they profess to seek, will suddenly come to his temple? He must have come there already—so we know He did—for there is not one stone of the temple left standing upon another: The Lord, whom you seek, shall suddenly come to his temple,—

Even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the LORD of hosts.

Christ was the great messenger of the covenant, the messenger of mercy; and the Lord's own people, even in that ancient time, delighted in anticipating the coming of the Christ of God, the anointed and appointed messenger of the Lord of hosts.