When you are able to see with no dust of knowledge on the mirror of your soul, when your soul is without any dust of knowledge, when it is just a mirror, it reflects that which is. That is wisdom. That reflecting of that which is, is wisdom. Knowledge gratifies the ego, wisdom happens only when the ego is gone, forgotten.
Knowledge can be taught; universities exist to teach you. Wisdom cannot be taught, it is like an infection: you have to be with the wise, you have to move with the wise, and only then will something start moving inside you