"Watch out! I'm sending my messenger, and he will prepare the way before me. Then suddenly, the LORD you are looking for will come to his Temple. He is the messenger of the covenant whom you desire. Watch out! He is coming!" says the LORD of the Heavenly Armies.

You said, "It is futile to serve God,' and, "What did we get out of it when we carried out his requirements and went about like mourners in the presence of the LORD of the Heavenly Armies?'