This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...sacrifice others to any desire of his own or to sacrifice himself to any desire of others; then man’s only ethical alternative is to be a sadist or a masochist.
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The moral canniba
lism of all hedonist and altruist doctrines lies in the premise that the happiness of one man necessitates the injury of another.
Today, most people hold this premise as an absolut
e not to be questioned. And when one speaks of man’s right to exist for his own sake, for his own rational self-interest, most people assume automatically that this means his right to sacrific...