To prophesy is to speak God’s message in God’s name and under the influence of God’s Spirit. First, make sure it is a message from God and not of your own accord. Second, make sure that only God authorized you to declare the message on His behalf. Finally, make sure you are led by and filled with the truth of the Spirit of God and not some other spirit. When the message is directly from heaven and precisely spoken, you can expect God to make it happen.