This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...al has to hunt for it. Man has to produce it.
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A plant has no choice of action; the goals it pursues are automatic and innate, determined by its nature. Nourishment, water, sunlight
are the values its nature has set it to seek. Its life is the standard of value directing its actions. There are alternatives in the conditions it encounters in its physical background — such
as heat or frost, drought or flood — and there are certain actions which it is able to perform to combat adverse conditions, such as the ability of some plants to grow and crawl from under a ...