Burke defined the rhetorical function of language as "a symbolic means of inducing cooperation in beings that by nature respond to symbols." His definition of humanity states that "man" is "the symbol using, making, and mis-using animal, inventor of the negative, separated from his natural condition by instruments of his own making, goaded by the spirit of hierarchy, and rotten with perfection." For Burke, some of the most significant problems in human behavior resulted from instances of symbols using human beings rather than human beings using symbols.