They feared the giants instead of God. They focused on the problems instead of the promises. They saw walled cities instead of the will of God. And because they missed what the Spirit was saying, they wandered in the desert 40 years. They died there and their bones bleached in the wilderness.
Every believer may not be called to preach, but every Christian is called to pray. Prayer is our duty. Prayer is our privilege. Prayer, like air, water and food, is necessary for our survival and growth. But many believers regard prayer as an optional activity.
It is important that we know and hear God's voice, for the words of God reveal the will of God.