ABSTRACT
The main distinction among all our presentations is between intuitive and abstract presentations. The latter constitute only one class of presentations, concepts. And these are on earth the possession only of human beings, whose capacity for them, distinguishing them from all animals, has for ages been called reason. The world as presentation, then, in which respect alone we are considering it here, has two essential, necessary, and inseparable halves. The one is the object: its form is space and time, and through these pluralities. The other half, however, the subject, does not lie within space and time; for it is whole and undivided in every being that is engaged in presentation. Anyone who has recognized the mode of the Principle of Sufficient Ground that makes its appearance in pure time as such, and on which all counting and calculating rest, has just by that fact also recognized the entire essence of time.
