This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...ts achievement is actually to his interest.

To claim that a man’s interests are sacrificed whenever a desire of his is frustrated — is to hold a subjectivist view of man’s va
lues and interests. Which means: to believe that it is proper, moral and possible for man to achieve his goals, regardless of whether they contradict the facts of reality or not. Which means: to hold an irrational or mystical view of existence. Which means: to deserve no further consideration.

In choosing his goals (the specific values he seeks to gain and/or keep), a rat...
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