Core beliefs: definition and how they form

Core beliefs are the deepest, most fixed ideas you hold about yourself, other people, and the world — statements like “I am capable” or “I am not enough.” They typically form early in life through repeated experience, run mostly outside conscious awareness, and quietly shape how you read new situations long after the experiences that built them.

How do core beliefs form?

Psychiatrist Aaron Beck developed the underlying theory in the 1960s and 70s while studying depression. The Beck Institute for Cognitive Behavior Therapy, which he founded, still teaches it today. Core beliefs form early in life: through how caregivers responded to you, formative relationships, and events that carried outsized emotional weight.

In cognitive psychology, this structure is sometimes called a schema. The American Psychological Association defines a schema as a mental structure that organizes past experience and shapes how new information gets read.

Jeffrey Young’s schema therapy, which extended Beck’s model, describes beliefs taking root when core needs, like safety or secure attachment, go unmet growing up. Once formed, a belief tends to get reinforced over time, since the mind notices what confirms it more readily than what contradicts it.

How are core beliefs different from everyday thoughts?

Judith Beck’s cognitive model, widely taught in CBT training, describes beliefs working in layers. Core beliefs sit at the bottom: global, rigid, and mostly outside conscious awareness. Above them, intermediate beliefs are the rules and assumptions you build to cope with a core belief.

On the surface are automatic thoughts, the specific, moment-to-moment reactions you actually notice, like “they think I’m boring” in one conversation. That automatic thought is usually the only layer you consciously hear. The core belief underneath is doing most of the work.

How is a core belief different from EMDR’s negative cognition?

EMDR uses a related but narrower term: the negative cognition, the specific self-blaming statement tied to one memory, like “it’s my fault.” A core belief is the broader, cross-situational pattern a negative cognition often reflects. The same belief, say, “I’m not safe,” can surface as the negative cognition attached to several different memories.

EMDR’s Adaptive Information Processing model frames those memories as the reason a belief still feels current instead of settling into the past. Reprocessing works on the memories; the belief itself tends to loosen as enough of them do.

Can a core belief change?

Yes, though a rigid one rarely shifts from insight alone. CBT and schema therapy test a core belief against real evidence over many sessions, and EMDR works through the memories that keep reinforcing it. Both are usually done with a trained professional, especially for a belief central to how you see yourself. Our guides to negative core beliefs and how they change cover those patterns in more depth.

EmEase, a self-guided EMDR app, offers bilateral stimulation, the technique behind EMDR, as a wellness practice for the everyday stress a belief like this can stir up. Try it at app.emease.com.