Through emotional intensity - A first responder who has witnessed a life-threatening event, such as a violent traumatic assault, may develop the belief, "the world is a dangerous place." This intense experience can lead to anxiety, hypervigilance, or PTSD, causing them to feel fearful or on edge even in safe situations.
By association - If every time you spoke up as a child you were dismissed, you might associate speaking up with being ignored and develop the belief “My voice doesn’t matter.”
Through personal experiences - There may have been a time in your life where you had limited support, this experience could hardwire in the belief “I have to do it all on my own,” causing you to avoid help, burning yourself out even in present situations where help IS available.

Belief Balance