"The ignorant man is not free, because what confronts him is an alien world, something outside him and in the offing, on which he depends, without his having made this foreign world for himself and therefore without being at home in it by himself as in something his own. The impulse of curiosity, the pressure for knowledge, from the lowest level up to the highest rung of philosophical insight arises only from the struggle to cancel this situation of unfreedom and to make the world one's own in one's ideas and thought."