How Do You Discern Between What Feels Good and Whats True?

Have you ever heard the saying "go with your gut" or "trust your gut"? But have you also heard "detox your gut before you can trust it"? So how often are we trusting our gut or our internal guidance system without clearing it of the things it's accumulated over time, from false perceptions, traumatic experiences and so on. Can we really trust what feels good to us?