This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...or which its knowledge is inadequate, it perishes — as, for instance, an animal that stands paralyzed on the track of a railroad in the path of a speeding train. But so long as it lives, an an
imal acts on its knowledge, with automatic safety and no power of choice: it cannot suspend its own consciousness — it cannot choose not to perceive — it cannot evade its own perceptions —
it cannot ignore its own good, it cannot decide to choose the evil and act as its own destroyer.
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Man has no automatic code of survival. He has no automatic course of action, no au...