...happiness is not an ideal of reason but of imagination, resting solely on empirical grounds. - Immanuel Kant

...new prejudices will serve as well as old ones to harness the great unthinking masses.

For this enlightenment, however, nothing is required but freedom, and indeed the most harmless among all the things to which this term can properly be applied. It is the freedom to make public use of one's reason at every point. But I hear on all sides, 'Do not argue!' The Officer says: 'Do not argue but drill!' The tax collector: 'Do not argue but pay!' The cleric: 'Do not argue but believe!' Only one prince in the world says, 'Argue as much as you will, and about what you will, but obey!' Everywhere there is restriction on freedom.

Значи чисто логческитя критерий на истината, именно съгласуването на едно познание с общите и формални закони на разсъдъка и разума, е наистина conditio sine qua non. По-нататък обаче логиката не може да отиде и с никакъв пробен камък тя не може да открие грешката, която засяга не формата, а съдържанието.

Skepticism is thus a resting-place for human reason, where it can reflect upon its dogmatic wanderings and make survey of the region in which it finds itself, so that for the future it may be able to choose its path with more certainty. But it is no dwelling-place for permanent settlement. Such can be obtained only through perfect certainty in our knowledge, alike of the objects themselves and of the limits within which all our knowledge of objects is enclosed.