To see and feel nature from within means not asking what the world is. Classification is a human achievement which separates the human from nature--and separation always means conflict and unhappiness.
Continuous change and ultimate destruction after a certain duration is the very nature of all phenomena. Adversity and prosperity, happiness and misery, birth and death are inescapable aspects of the natural process of causality, but it is only anxiety and nothing else that is the root cause of suffering in this world. The man of wisdom, divorced from his senses, wants nothing, grieves for nothing, and fears nothing, and thus he lives in total freedom from anxiety.
Ramesh S. Balsekar