According to Buddhist philosophy and practice, all things are empty of existing from their own side.  What is the reason?  Because they are interdependent.  All things arise by the power of interdependence.  Whatever is interdependent is emptiness.

Written by Khenpo Karten Rinpoche in his book Precious Teachings, page 73, “Essence of the Heart Sutra in Brief.”  (page 79 in the online PDF). 

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