Behold, I am sending My messenger, and he will clear a way before Me. And the Lord, whom you are seeking, will suddenly come to His temple; and the messenger of the covenant, in whom you delight, behold, He is coming,” says the Lord of armies. – Malachi 3:1

I love this foretelling of Christ in the Old Testament. “He is coming,” and the simplicity of the statement combined with the unknown of the messenger (I believe is referring to John the Baptizer) is such a cool thing to see.