This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...e name of the potential value he represents — until and unless he forfeits it.
read full book
A rational man does not forget that life is the source of all values and, as such, a common bond am
ong living beings (as against inanimate matter), that other men are potentially able to achieve the same virtues as his own and thus be of enormous value to him. This does not mean that he regar
ds human lives as interchangeable with his own. He recognizes the fact that his own life is the source , not only of all his values, but of his capacity to value. Therefore, the value he grants ...