This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...or suffering.” Happiness is the successful state of life, suffering is the warning signal of failure, of death. Just as the pleasure-pain mechanism of man’s body is an automatic indicator of his body’s welfare or injury, a barometer of its basic alternative, life or death — so the emotional mechanism of man’s consciousness is geared to perform the same function, as a baromete r that registers the same alternative by means of two basic emotions: joy or suffering. Emotions are the automatic results of man’s value judgments integrated by his subconscious; emotions are...
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