when we say empty ' khong ', it means temporally. lt does not mean non existence. Compare to eternity, we/ everything in this universe's temporally existence is negligible/ insignificant . Comparatively everything becomes so fast that we are like non existence relative to eternity/ permanent. Everything else are just description of our life process from birth to death, phycology , mental (false mind ) , consciousness ( false mind ) etc . We call false mind because it is temporally, Pure mind existence is permanent/ eternal. Except pure mind , everything else are temporally ( khong/ empty ) , ' sa na sa na ' when compared relative to permanency /eternal