Cup may be cup of coffee, cup of tea or cup filled with something else. But none of the content makes it a cup. Content, same or different, comes and goes. Cup stays.
It is similar with the human being, which can be filled with various thoughts and feelings. But neither one of them is making human for what they really are.
Essence of the cup, its main characteristic from which stems its functionality is - emptiness.
So it is with the human being; centered with pure luminosity which enables all the appearances to appear; apparently solid body and apparently less solid thoughts and feelings.
Those who know this core, this silent spaciousness - know that it is substantial Spirit from which everything is built and to which everything can be reduced. It is one, indivisible, basic, open-ended state.
Next time you empty your cup of coffee or tea, enter within, beyond thoughts and feelings, into the clear spaciousness of heart and mind and let the awareness meet awareness in this luminous clarity.