Jesus used a few different words that are translated as "knowing" or "to know" in the Christian bible.  In the original language the Greek words can be translated as other than "knowing" or colors of knowing.  Sometimes Jesus "knew" something as an observation or an understanding or a perceiving.  Sometimes his "knowing" was like our modern expression of how we would describe our relationship with form.  He "knew" concepts just like we do.  But sometimes he used a special word.  This word (translated as "to know") is a word that implied intimate experiencing.  As an example: "Adam knew Eve and they had a child." This kind of intimate knowing is why the formless manifests as form to know the formless. And they said, “Why do you speak to them in parables?”  And he answered them, “To you it has been given to know the secrets of the kingdom of heaven