How much should we depend on God? How much should we depend on ourselves? Here are the three main points?
1) You Have an Enemy- there may be human enemies of a sort but ultimately we do not fight against flesh and blood but against Satan and the forces of darkness. We need to be aware of his existence and the danger we face.
2) You Can’t Win On Your Own- the Israelites were to fight and not sit by passively but they were also to depend on Yahweh- this is the point of the raised staff- utter dependence. And that’s us too- we cannot win- we cannot finish without God’s help.
3) You Have Someone Who Fights for You- God is committed to and passionate about his people- so, he gives victory and declares that he will bring his judgment on the Amalekites.