Exodus 5:1-2 KJV
And afterward Moses and Aaron went in, and told Pharaoh, Thus saith the LORD God of Israel, Let my people go, that they may hold a feast unto me in the wilderness.
And Pharaoh said, Who is the LORD, that I should obey his voice to let Israel go? I know not the LORD, neither will I let Israel go.
Moses and Aaron went to speak to Pharaoh but they did not speak for themselves. Whatever opinions they may have had at this moment we are not told. What we are told is what they spoke for God. They even spoke in the first person. They quoted God to Pharaoh.
Pharaoh made a huge but common blunder; he received the Word of God as if it were the words of men. They held no power with him. He heard no authority in them. This would ultimately be his ruin.
People are forever having an audience with men of God, attending services, listening to messages, hearing Bible reading. There is no shortage of church houses and, though numbers of attendees are proclaimed to be declining (according to polls, that is not my observation in Independent Baptist Churches), there seems to be no small number of people supporting religious services. The problem is that they leave none the better and sometimes worse than before they came. They hear, but they do not hear it as the authoritative Word of God. They hear but they treat it as just another of the many opinions of men. They hear but they refuse what they have heard.
And they do it, sooner or later, to their own hurt.