My friend Peter was never one to let an “I know …” statement go unchallenged. His first question was always “How do you know”? The response was often “I just know”. Then came the big question “How do you know that you know”?
Is the “knowing” from personal experience, a subjective opinion? Is it someone elses thought (or even your own thought) that has been accepted as being so? Is it an inherited belief system?
One way to “know” is to question everything, to be willing to hold apparently contradictory viewpoints as an opportunity for deeper understandings, to be in a place of not knowing.
Then there’s a place to “know” what you know.