This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...s only a living organism that faces a constant alternative: the issue of life or death. Life is a process of self-sustaining and self-generated action. If an organism fails in that action, it di es; its chemical elements remain, but its life goes out of existence. It is only the concept of ‘Life’ that makes the concept of ‘Value’ possible. It is only to a living entity that thin gs can be good or evil.”

To make this point fully clear, try to imagine an immortal, indestmctible robot, an entity which moves and acts, but which cannot be affected by anything...
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