Our beliefs always come from our own interpretation of experiences.
Quite often, however, the conclusion we draw from these experiences is rather flawed. However, once these have solidified as beliefs, more and more such experiences emerge from this unintended "desire."
For example, if we are convinced that the entire world is against us, then this involuntary desire manifests itself in new and corresponding events. As a result, we saw new and similar desires and the doctrine will manifest.
We will experience that the world is increasingly "against us" - because we believe in it! Yet, the opposite belief would be that the world is for us and, on every possible occasion, helps us to establish ourselves with exactly the same effort.
The result would be just another.