It will be difficult to approach nothingness directly - very difficult and arduous. So it is easy to pass through one object as a vehicle. First put one object in the mind, and feel it so totally that you need not remember anything else. Your whole consciousness is filled with this one object. Then leave this also, forget this also.
You fall into an abyss. Now nothing remains, no object. Only your subjectivity is there - pure, uncontaminated, unoccupied. This pure being, this pure consciousness, is your nature.