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