The art of loving, to have or to be

To be honest, this quote is made from two books written by Erich Fromm. The first one is "the art of loving" and the second one is "to have or to be". Erich Fromm is a psychoanalyst who born on March 23, 1900, at Frankfurt am Main was a German social psychologist, psychoanalyst, sociologist, humanistic philosopher, and democratic socialist. He was associated with what became known as the Frankfurt School of critical theory. (source from wikipedia.org)