Muslims must believe that all power success and victory comes from God alone.
Look at the Afghans during the time of the Soviet invasion. They were among the poorest Muslims in the world yet they were sustained by their faith in God and God alone.
I went through life like an idiot for a great deal of the time saying there's nothing I would change. That was a very arrogant thing to say. There's a lot I would change. There are people I would have steered clear of.