Nature is always alive with movement and life, ever changing, never still.
The best a photograph can do is capture a single moment, freeze a small slice of time.
That maybe a photograph's limitation, but it is more than enough to get a sense of the breathtaking loveliness of nature and record a unique but fleeting moment of beauty forever.
(ok, maybe not forever. After all, a photo can get deleted, destroyed by a malicious virus, faded by old age, spoilt by water, torn by kids, thrown in the trash, and....anything else? You see, lots of horrible things can happen to prevent it from lasting forever, but I think you get the idea. :))