Knowing is the most important sense of all.  You think you must see or touch or hear a thing to know truthfully, but the physical senses deceive you.  What do you know in your heart?  Close your eyes.  Sit in the silence.  Shut out the physical senses  and ask your burning questions.  The answers come not through the typical human means, but through knowing.  And how to know if you can trust the answers?  You learn to know the difference between the voice of the soul and the voice of fear through the same sense of knowing.  It is a bit of a paradox, is it not?