Heidegger has (imo) a quite interesting view, quite radical also within the context of the history of philosophy, of human nature.
In division one section 9 and 10 of Being and Time Heidegger sets the stage for what he calls the analytic of Dasein…which basically just means the study and understanding of the kind of beings that human beings are (I am going to be skipping around between these two sections because it seems to me they have to be read in this way to get at what is being said in each one individually…actually the whole book has to be read in this).
Heidegger rejects the classical (and prevalent throughout philosophy) view that human being essence is ‘rational animal’. His reason for this is because this view, according to him, would pin down human beings in terms of a property that they have…i.e. ‘rational’. What is false about this is not rationality…but that rationality is something we have that defines who we are…instead Heidegger thinks of rationality as one possible way that we can be…we are not rational beings…we can act rationally
(and non-rationally also). More difficult (as is almost always the case when Heidegger starts talking ‘theology’) is the theological definition that he offers (he writes this in latin) that basically man transcends himself towards God, and is in that sense created in God’s image…that is a deep passage, but the issue for Heidegger is that it views human nature as something self-evident…and by this he means, in my reading, that this transcendence itself is not something that is ‘put into question’ meaning that the structure of its possibility and the phenomenology of its realization has not been explicated. There is definitly more there, but this is all Heidegger has to say about it at this point in the text.
On the other hand, Heidegger says that the essence of Dasein “lies in its “to be”” which means he is going to characterize human being dynamically…more along the lines of a ‘process metaphysic’ as opposed to a ‘substance metaphysic’. Unlike “things” when we talk about the nature of human being, Heidegger says we are not talking about its “what” but about its Being…that is somewhat esoteric unless one keeps in mind the passage “they (referring to properties that we might attribute to the essence of Dasein) are in each case possible ways for it to be, and no more than that” and importantly “In each case Dasein is its possibility, and it ‘has’ this possibility, but not just as a property as something present-at-hand would”. To come to terms with the being of human nature is to come to terms with those conditions, or in Heidegger’s terms the ‘structure’ that makes possible the kind of possibility that we are. This turns out to be an inquiry into temporality way later on in the book.
Because we are possibility, Heidegger says that we can ‘chose and win’ ourselves or ‘lose’ ourselves. This is the famous authentic and inauthentic modes of being that is almost always central to existential philosophies in some form or another. Heidegger doesn’t mean that inauthentic being is something ‘negative’…as a matter of fact, he states we are almost always in the mode of inauthentic being. Inauthentic being is essentially the mode (or the way we exist ‘towards’ the world) we are in when we are ‘lost in the moment’ of acting…when we are just doing…whether it be working, playing, making love, cooking supper, sitting on the john, typing at the computer…our ‘everydayness’ as Heidegger puts it. Authentic being is an experience in which our being itself is in question…we become strongly aware that we are possibility…that we must chose ourself without anywhere of absolute foundations to turn to for help. We must act but without any guide other than our own self, we can do whatever is possible for us…that is open. Not just realizing that you could do whatever, but what it is that makes you the kind of being that can do whatever.
Trey[/i]