"The laws would not prevent each man from living according to his inclination, unless individuals harmed each other; for envy creates the beginning of strife."
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Source : "Ancilla to the Pre-Socratic Philosophers: A Complete Translation of the Fragments in Diels Fragmente Der Vorsokratiker", translated by Kathleen Freeman, Harvard University Press, (p. 166), 1948.
Source : "The Enchanted Loom: Mind in the Universe (Letting the Fossil Record Speak; Life - How Did It Get Here? By Evolution or by Creation?)". Book by Robert Jastrow (p. 23), 1981.