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Cliquer sur les phrases pour les voir dans leur contexte. Les textes de Immanuel Kant et David Hume sont disponibles auprès du Projet Gutenberg.

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If we wish to set one of these two apart from the other--space from phenomena--there arise all sorts of empty determinations of external intuition, which are very far from being possible perceptions.

 But as we can apply to it none of the conceptions of our understanding, the representation is for us quite void, and is available only for the indication of the limits of our sensuous intuition, thereby leaving at the same time an empty space, which we are competent to fill by the aid neither of possible experience, nor of the pure understanding. If, for example, we presuppose that the world of sense is given in itself in its totality, it is false, either that it is infinite, or that it is finite and limited in space. We must now consider three phaenomena, which seem to be, in a manner, the reverse of these: Why a very great distance encreases our esteem and admiration for an object; Why such a distance in time encreases it more than that in space: And a distance in past time more than that in future. If light be not given to the senses, we cannot represent to ourselves darkness, and if extended objects are not perceived, we cannot represent space. And thus Leibnitz regarded space as a certain order in the community of substances, and time as the dynamical sequence of their states. Our expositions, consequently, teach the reality (i.e., the objective validity) of space in regard of all which can be presented to us externally as object, and at the same time also the ideality of space in regard to objects when they are considered by means of reason as things in themselves, that is, without reference to the constitution of our sensibility. 4 It is in relation to possible objects in space* I desire therefore our mathematician to form, as accurately as possible, the ideas of a circle and a right line; and I then ask, if upon the conception of their contact he can conceive them as touching in a mathematical point, or if he must necessarily imagine them to concur for some space.