Robert A. Heinlein Quotes on Emotions
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Jealousy is a disease, love is a healthy condition. The immature mind often confuses one for the other, or assumes the greater the love, the greater the jealousy. In fact they are almost incompatible; both at once produce unbearable turmoil.
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Sex should be friendly. Otherwise stick to mechanical toys; it's more sanitary.
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The more you love, the more you can love - and the more intensely you love. Nor is there any limit on how many you can love. If a person had time enough, he could love all of that majority who are decent and just.
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All normal human beings have soi-disant mixed-up glands. The race is divided into two parts: those who know this and those who do not.