This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...ess of self-sustaining action. The goal of that action, the ultimate value which, to be kept, must be gained through its every moment, is the organism’s life.

An ultimate value i
s that final goal or end to which all lesser goals are the means — and it sets the standard by which all lesser goals are evaluated. An organism’s life is its standard of value : that which furthers its life is the good, that which threatens it is the evil.

Without an ultimate goal or end, there can be no lesser goals or means: a series of means going off into an infi...
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