There is a way in which you can know things by linear thought process — by one thought, after another thought, after another thought.
There is also a gestalt phenomenon of an experience of understanding how something is. This is something that is not in a sequential thought process. It is not thought itself.
This is a method put forth by Ramana Marhashi. A beautiful saint in India who became realized at 17 years old and for 50 years he stayed in a wooden shed near Madras. Beautiful, beautiful being.
And he taught this very simple method called “Vichara Atma” — meaning method of self-enquiry. “Who Am I?”