>>3711242Reason can only prevent error, that is, a judgment on insufficient grounds, by opposing to it a known truth; as for example, the abstract knowledge that the cause of the weaker light of the moon and the stars at the horizon is not greater their distance, but the denser atmosphere; but in all the cases we have referred to, the illusion remains, in spite of every abstract explanation.
This is because, even in the case of man, the understanding is irrational, and should be completely and sharply distinguished from the reason, which is a faculty of knowledge that belongs to man alone.