A river disappears into the ocean. Do you think the river comes to know the ocean? It becomes the ocean, but there is no knowing. In fact, when you become one with something, how can you know it? Knowledge requires division; knowledge is basically schizophrenic. The object has to be separate from the subject; the knower has to keep a distance from the known. If the distance disappears, there will be no knowledge possible.
And that's what happens in mysticism: the seeker becomes one with the sought, the lover dissolves into the beloved, the dewdrop slips, falls into the ocean and becomes the ocean. There is no knowledge. In such unity knowledge is not possible. In such unity there is only experience, and experience not of something outside you, but something inside you. It is experiencing rather than experience.