Emulation is grief arising from seeing one's self, exceeded or excelled by his concurrent, together with hope to equal or exceed him in time to come, by his own ability. But envy is the same grief joined with pleasure conceived in the imagination of some ill-fortune that may befall him.
Thomas HobbesDuring the time men live without a common power to keep them all in awe, they are in that conditions called war; and such a war, as if of every man, against every man.
Thomas Hobbes