Life’s goal for a believer is to worship Allah. One of the most significant ways of worshipping is done through communicating Allah’s message to people everywhere, and struggling against the companions of Satan. This struggle is usually very severe and harsh because most of the time “the companions of Satan" are better equipped.
The believers are unaffected by this, because they are aware of the real cause and effect functioning of the world. And this reality tells them that victory has nothing to do with superiority in numbers or strength, but with the command and will of Allah. Indeed, true religion has to its credit many victories of faith:
“How often, by Allah’s will, has a small force vanquished a big one? Allah is with those who steadfastly persevere.”