Parshas Beshalach - Moshe's Hands

The Jews just left Egypt, barely cohesive as a nation and Amalek decides to attack them.
Moshe tells Yehoshua to go the next day to fight with Amalek and he will go up and stand on the mountain.
Whenever Moshe, on top of the mountain, raised his hands Bnei Yisroel were stronger but when he put his hands down Amalek was stronger.
The Mishna in Rosh Hashana asks, "V'chi yadav shel Moshe osos milchama?"
"Do the hands of Moshe make war or break war?" Was it actually magic hands of Moshe which made Israel win or lose the war?
"Rather it showed the Bnei Yisroel that when they looked up to Hashem for their answers and devoted their hearts to their Father in Heaven they would succeed, they would win"
Also I believe that the message is that one, especially a leader, needs to stand strong and firm in his principles. Not being wishy washy but being upright and definite in his morals and values. Then the people will follow him and do the correct thing. When Moshe showed strength and conviction by keeping his hands "up", the people were able to be follow and fight the war successfully.
It is really important to know that we must look up to Hashem for our assistance and guidance, and that we must remain determined and resolute in our morals and principles.