Fear ye not

Fear is an often unexpected emotion that seeks to rule over us. Here the Israelite's were already between a rock and a hard spot but now the Egyptian army was approaching. The Israelites now panicked but they did go to God for help and He did intercede on their behalf and kept Pharaoh from attacking. However they had no patience and quickly started blaming Moses for their trouble. What is it that is holding us back and making us to fear?