At last, however, he began to think -- as you or I would have thought at first; for it is always the person not in the predicament who knows what ought to have been done in it, and would unquestionably have done it too . . .
Time is not an empirical concept. For neither co-existence nor succession would be perceived by us, if the representation of time did not exist as a foundation a priori.
Upon the solution of this problem, or upon sufficient proof of the impossibility of synthetical knowledge a priori, depends the existence or downfall of metaphysics.
Some of the craftiest scoundrels that ever walked this earth . . . will gravely jot down in diaries the events of every day, and keep a regular debtor and creditor account with heaven, which shall always show a floating balance in their own favour.
The worst class of sum worked in the every-day world is cyphered by the diseased arithmeticians who are always in the rule of Subtraction as to the merits and successes of others, and never in Addition as to their own.
No one has the least regard for the man; with them all, he has been an object of avoidance, suspicion, and aversion; but the spark of life within him is curiously separable from himself now, and they have a deep interest in it, probably because it IS life, and they are living and must die.
Natural science physics contains in itself synthetical judgments a priori, as principles. ... Space then is a necessary representation a priori, which serves for the foundation of all external intuitions.
THE SLOW ARROW OF BEAUTY. The noblest kind of beauty is that which does not transport us suddenly, which does not make stormy and intoxicating impressions such a kind easily arouses disgust but that which slowly filters into our minds.