“Yet, how is it that descriptions of numbers in terms of apples or bananas can allow a child to know what 'three days' means, that same abstract concept of 'three' being involved as with 'three oranges'? Of course, this appreciation may well not come at once, and the child may get it wrong at first, but that is not the point. The point is that this kind of realization is possible at all. The abstract concept of 'three', and of this concept as being one of an infinite sequence of corresponding concepts-the natural numbers themselves-is something that can indeed be understood, but, I claim, only through the use of one's awareness.”