This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...person to be saved is a stranger, it is morally proper to save him only when the danger to one’s own life is minimal; when the danger is great, it would be immoral to attempt it: only a lack o f self-esteem could permit one to value one’s life no higher than that of any random stranger. (And, conversely, if one is drowning, one cannot expect a stranger to risk his life for one’s s ake, remembering that one’s life cannot be as valu- able to him as his own.)

If the person to be saved is not a stranger, then the risk one should be willing to take is greater i...
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