, we can easily interpose a world of new strange phenomena, circumstances, veritable volitions, without the snapping of this long chain of the will. But what is the underlying hypothesis of all this? How thoroughly, in order to be able to regulate the future in this way, must man have first learnt to distinguish between necessitated and accidental phenomena, to think causally, to see the distant as present and to anticipate it, to fix with certainty what is the end, and what is the means to that end; above all, to reckon, to have power to calculate⁠—how thoroughly must man have first become calculable, disciplined, necessitated even for himself and his own conception of himself, that, like a man entering into a promise, he could guarantee himself as a future .