When I think of my choices and my uncertainty when I don't know what to do, I think of Moses seeing 3-4 millions Egyptians coming towards him and his people, and 2.5 million Israelites looking at him like "What have you gotten us into?"
Did he doubt? Did he think perhaps he wasn't listening and didn't hear from God completely? Was he reviewing all his past actions and thinking what he should have done differently?
We are not given any reason to believe he doubted. In fact, it seems like when the people came complaining to him saying Moses should have left them alone in Egypt, that they would have been better off serving the Egyptians, and now they would surely die in the wilderness, Moses received an immediate word from God regarding Pharaoh and his army. "Moses answered the people, “Do not be afraid. Stand firm and you will see the deliverance the Lord will bring you today. The Egyptians you see today you will never see again. The Lord will fight for you; you need only to be still.” Exodus 14:13
We have such a contrast between the faith of Moses and that of his followers. They saw the same miracles Moses saw, so that couldn't be it. What makes the difference. Why do some stand in faith and others right next to them fall into doubt and unbelief?
I think I know the answer.
Doubt and unbelief are sin. They are no different than any other sins. Doubt and unbelief are a choice. Moses chose to believe God.
"Choose this day whom you will serve." Joshua 24:15
"You cannot serve two masters." Matthew 6:24
Exodus 33:13 gives us a glimpse of Moses humanity. Moses asked God to show him His plan; he wanted to avoid the uncertainty, the unknown. But God said no. He said "My Presence will go with you, and I will give you rest."