Self awareness. Discernment of the contents of the consciousness.
For every human being, we operate in the world as if our beliefs are objective reality, fact, or truth. And we need to. Otherwise, we don't function. But can we, at the same time, observe and distinquish within ourselves that which is a belief and that which is a fact? Beliefs may be functional or dysfunctional. Any one belief we may hold may be functional in one set of circumstances, and dysfunctional in another.
Beliefs and assumptions are closely related. We can not operate in the world without utilizing both. But unless we recognize and distinquish between our beliefs, assumptions, and that little bit that can truly be called objective, we can not or will not examine our beliefs and assumptions, and will therefore not attempt to adapt them when objective reality impinges on them, nor will we periodically exam them to determine their functionality. And examinining functionality is not a simple task. Functional for who? Me as an individual? My family? My community? My country? My society? The world?