t become fact unless it is subjected to argumentation. Thus, liberty is not complete unless it is challenged, and the way each individual grasps liberty is as important as the concept itself (pp. 97 99).
In his championing of the idea of liberty, Mill took a broad goal from Athenian democracy. This is most evident in the Greek idea of self development, in which it is the privilege of every individual to experience in his or her own way, and to interpret that experience in a cogent and personal manner (pp. 59 63). Indeed, one of the most famous quotations from On Liberty epitomizes Mill's championing of liberty:
. . . the sole end for which mankind are warranted, individually or collectively, in interfering with the liberty of action of their number is self protection. That
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