The senses do not enable us to cognize any entity in its Being; they merely serve to announce the ways in which 'external' Things within-the-world are useful or harmful for human creatures encumbered with bodies....they tell us nothing about entities in their Being.
Martin HeideggerThe mathematical is that evident aspect of things within which we are always already moving and according to which we experience them as things at all, and as such things. The mathematical is this fundamental position we take toward things by which we take up things as already given to us, and as they must and should be given. Therefore, the mathematical is the fundamental presupposition of the knowledge of things.
Martin HeideggerI see the situation of man in the world of planetary technicity not as an inexitricable and inescapable destiny, but I see the task of thought precisely in this, that within its own limits it helps man as such achieve a satisfactory relationship to the essence of technicity. National Socialism did indeed go in this direction. Those people, however, were far too poorly equipped for thought to arrive at a really explicit relationship to what is happening today and has been underway for the past 300 years.
Martin Heidegger