It has been an old fallacy that meditation also needs an object to meditate upon. The very word 'meditation' is wrong because it gives the idea that you have to meditate upon something. Meditation simply means that you don't have anything left to meditate upon.
All is empty: there is no object, no chanting, no mantra, no sutra... just pure emptiness. And suddenly all your energy of awareness turns upon yourself, without any effort on your part. And the turning of the energy of awareness upon yourself is the ultimate experience of life, of light, of everything that is really valuable;everything that cannot be purchased but can be attained.