You know what you know.  How do you explain this feeling?  At times you cannot, for it is so subtle and so subtly different from thoughts that come through thinking.  Knowing comes through soul-awareness, based in the heart.  It is the purest, truest way of knowing, and learning, and being aware.  So, tune into your heart, and what you know will grow as you intuitively travel through life, flowing with the knowing.