Values

You think you know someone's values. Then you experience that person in a situation where their values are challenged to the core. How do they act? Are their actions consistent with their professed values?

People themselves may not even know what their true values are until they are tested. You can't trust what people say not only because people prevaricate but also they do not know themselves.

Practice trusting yourself. Your intuition is your best guide for matters that cannot be cracked by reason alone. Regardless of what someone professes about their beliefs, values, aspirations, listen to your natural intuitive response to the person's behavior, not just their words.