There is an entire tradition associated with un-knowing. It begins with a recognition that God is not like anything else. Our words and ideas fail us.
A practice which helps to get our minds to this place is 3-step process:
* We make a statement. (God is wisdom.)
* We negate the statement. (God is not wisdom.)
* we negate the negation. (God is not not-wisdom.)
This is a challenging and occasionally transcendent practice.
Click here to approach this is with a set of pre-designed statements.
Click here to apply the 3 steps to your own statements.
In a more general way, any practice is apophatic which does not rely on words. One example can be found here.
For a more in depth discussion of this concept, click here.