This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...metaphysical nature of man and of existence, man has to maintain his life by his own effort; the values he needs — such as wealth or knowledge — are not given to him automatically, as a gift of nature, but have to be discovered and achieved by his own thinking and work. One’s sole obligation toward others, in this respect, is to maintain a social system that leaves men free to ac hieve, to gain and to keep their values.

Every code of ethics is based on and derived from a metaphysics, that is: from a theory about the fundamental nature of the universe in whi...
read full book block explorer