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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.

Accordingly, the pure conceptions of reason at present under consideration are transcendental ideas.

But as this is an effect, which may easily be supposed to flow from that solidity and force, which, according to my system, attend those ideas that are established by reasonings from causation; it follows, that all the influence of belief upon the fancy may be explained from that system.

According to his conclusions, then, all that we term metaphysical science is a mere delusion, arising from the fancied insight of reason into that which is in truth borrowed from experience, and to which habit has given the appearance of necessity. They are already united in the mind: They present themselves at the same time to the conception; and instead of requiring any new reason for their conjunction, it would require a very powerful reason to make us over-look this natural affinity. This is a requirement of reason, which announces its cognition as determined a priori and as necessary, either in itself--and in this case it needs no grounds to rest upon--or, if it is deduced, as a member of a series of grounds, which is itself unconditionally true. As to what may be said, that the operations of nature are independent of our thought and reasoning, I allow it; and accordingly have observed, that objects bear to each other the relations of contiguity and succession: that like objects may be observed in several instances to have like relations; and that all this is independent of, and antecedent to the operations of the understanding. It will now be easy to draw this whole reasoning to a paint, and to prove, that when riches produce any pride or vanity in their possessors, as they never fail so do, it is only by means of a double relation of impressions and ideas. By mere conceptions I cannot think anything external, without, at the same time, thinking something internal, for the reason that conceptions of relations presuppose given things, and without these are impossible. This too is the reason, why all objects appear great or little, merely by a comparison with those of the same species. The latter, especially, is in a peculiar manner distinct from all empirically-conditioned faculties, for it employs ideas alone in the consideration of its objects, and by means of these determines the understanding, which then proceeds to make an empirical use of its own conceptions, which, like the ideas of reason, are pure and non-empirical.