On page 26 of A New Earth, Tolle states that when you look at an article of Nature - stone, flowers, birds,etc. - it'll show you the way back to God/Source, to YOURSELF. He went on to say that when you look at it, hold it and LET IT BE without imposing a word or mental label on it, a sense of awe, of wonder, arises within you. Its essence silently communicates itself to you and reflects your own essence back to you.