Since the ancient Greek tradition, the question of what it means to be human has most often been answered by defining humans with reference to animality or divinity. The paper will offer an alternative understanding of the meaning of human ʻnatureʼ by reinterpreting the ancient Greek philosophy of logos as a way towards self-knowledge, which human beings can approach and perhaps reach, not in idle isolation, but together through dialogue and friendship. The thesis of the paper is that true human self-knowledge, in so far as it is accomplishable, goes beyond the alternative of being a beast or a god and allows humans to access their own humaneness together. Yet, reaching that point, all human duplexity is not dissolved. Another sort of duality will appear which will be examined, in opposition to the simple dichotomy of either-or, under the form of the double nature of being human.