In Nature everything is time bound (seasons, sowing, reaping etc) but nature itself is not time bound. Nature is neither male nor female. Many Avatars come and go, but nature is not affected. The story of nature is emanating from all the impressions taken in your mind since birth. So long as you are holding on to these memories there will be no knowledge of Self. If you just study whatever has happened in nature, like history, great lives etc., you cannot realize your Self. You have to go within.
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