"Socrates said he knew nothing, precisely because if he knew nothing, he questioned everything. Philosophy arises from questioning the obvious: we do not accept what is, because if we accept what is, as Plato reminds us, we will become a flock, sheep. So, we do not accept what is. Philosophy arises as a critical instance, not acceptance of the obvious, not resignation to what is now fashionable to call healthy realism. I realise that, realistically, someone who enrols in philosophy is doing something crazy, but perhaps if there were no such crazy people, the world would remain as it is... as it is. So philosophy plays a very important role, not because it is competent in something, but simply because it does not accept something. And this non-acceptance of what is does not express itself through revolutions or revolts, it expresses itself through an attempt to find the contradictions of the present and of what exists, and to argue for possible solutions: in practice, thinking. And the day we abdicate thinking, we have abdicated everything."