Behaviour is the visible outcome and belief is the operating system underneath. When someone avoids conflict, overcontrols situations, resists feedback, or struggles to delegate, the behaviour itself is not the core problem. The real question is: What belief makes this behaviour feel necessary or logical to them? For example:

A belief such as “If I do not stay in control, I will be seen as incompetent” often shows up as micromanagement.
A belief like “Speaking up will lead to rejection” often manifests as silence in meetings.
A belief such as “My value comes from being useful” can appear as overworking or difficulty setting boundaries.

I think behaviour is the information that gives us clues about what someone believes to be true about themselves, others, or the world around them. What do you think?