When Moses saw the burning bush, he saw that God was in the plan. What Moses heard was the voice of God Himself. The appearance of the Lord was the first instance of direct revelation to Moses. After 80 years, Moses was now ready to fulfill the Lord’s calling. No other leader in biblical times had such a lengthy training period. Times of preparation are never wasted: God knows that, properly prepared, His servants can do more in 40 years than they could do in 120 unprepared.
God appears in the ordinary. This is one of many ways in which He gets our attention. He uses positive events such as the birth of a child, and He also uses tragedies. God does not cause tragedies, but He uses them to get our attention. He has to get our attention before He can present Himself to us. When He gets our attention, we stand on holy ground. When we stand on holy ground, we have to remove the dirt from our lives. That dirt is called sin.