So we see that they (Israel coming out of Egypt) were unable to enter (the Promised Land – Israel) because of unbelief. (ESV) Hebrews 3:19
Nosh: When we believe God has given us a vision to reach for something beyond our natural abilities also believe and thank God that He will enable us to accomplish it. As Paul points out, through the example of ancient Israel, fear and unbelief can hinder, even prevent the God intended miracles necessary to accomplish the great and mighty exploits God has planned for our lives. Believing God is faith in action. And acting in faith destroys fear and lays the foundation for miracles and great accomplishment.