There came a point where God's people were captives in Egypt. Eventually, they became so numerous they were culled. (This is a fancy term for killing off a percentage of something to keep the population down.) All baby boys were killed. Moses escaped this fate by being put in a basket, and sent down river. He was found by Pharaoh's wife who adopted him. Therefore, he became the perfect person to free God's chosen people from slavery. He was an Israelite by birth, and an adopted Egyptian. The perfect mix to speak for an oppressed people. At the point where Moses sees God as a burning bush, he's in exile with no desire to return.
As a burning bush, God kindles Moses' call to set God's people free. While we don't get burning bushes today, God still lights calls within us.
How has God lit a call in you? What is that call?
Kindle within us the call the need to do your will.