Reference: Matthew 7:29 NIV
“… because he taught as one who had authority, and not as their teachers of the law.”
Speak with authority, it will change the perception of the listener. If I don’t believe in what I am saying, should I be saying it? I shouldn’t. What I should be doing is asking questions or listening for answers. When I speak with God first to understand what I’m supposed to say and the manner in which I’m supposed to say it, why wouldn’t I speak with authority? I’m not responsible for their response. God is obligated to protect me when I’m in His order.