Read Exodus 4:1-17
Moses reluctance and fear were caused by over anticipation. He was worried about how the people might respond to him. We often build up events in our minds and then panic over what might go wrong. God does not ask us to go where he has not provided the means to help. Go where he leads, trusting him to supply courage, confidence, and resources at the right moment.
While it is easy to assume God could cause or cure any kind of problem. He saw that God indeed had all power and was commissioning him to exercise that power to lead the Hebrews out of Egypt.
Moses pleaded with God to let him out of his mission. After all, he was not a good speaker and would probably embarrass both himself and God.. But God looked at Moses problem quite differently. All Moses needed was some help, and who better than God could help him say and do the right things.
God made his mouth and would give him the words to say. It is easy for us to focus on our weakness, but if God asks us to do something, then he will get the job done. If the job involves some of our weak areas, then we can trust that he will provide words, strength, courage, and ability where needed.
When we face difficult or frightening situations, we must be willing to let God help us.
When feeling uncertain, some people need something to stabilize and reassure them. For assurance when facing great trials, God has given promises from his Word and examples from great heroes of faith. Any Christian may cling tightly to these.