“Thoughts without content are empty, intuitions without concepts are blind.”

“Two things fill the mind with ever new and increasing admiration and awe, the more often and steadily we reflect upon them: the starry heavens above me and the moral law within me. I do not seek or conjecture either of them as if they were veiled obscurities or extravagances beyond the horizon of my vision; I see them before me and connect them immediately with the consciousness of my existence.”

“Even if a civil society were to be dissolved by the consent of all its members (e.g., if a people inhabiting an island decided to separate and disperse throughout the world), the last murderer remaining in prison would first have to be executed, so that each has done to him what his deeds deserve and blood guilt does not cling to the people for not having insisted upon this punishment; for otherwise the people can be regarded as collaborators in his public violation of justice.”

“If man makes himself a worm he must not complain when he is trodden on.”

“The business of philosophy is not to give rules, but to analyze the private judgments of common reason.”

“Is this government of Britain's Isle, and this the royalty of Albion's King?”

“What a benefit would the American government, not yet relieved of its extreme need, render to itself, and to every city, village and hamlet in the States, if it would tax whiskey and rum almost to the point of prohibition! Was it Bonaparte who said that he found vices very good patriots? "He got five millions from the love of brandy, and he should be glad to know which of the virtues would pay him as much." Tobacco and opium have broad backs, and will cheerfully carry the load of armies, if you choose to make them pay high for such joy as they give and such harm as they do.”

“The State is a poor, good beast who means the best: it means friendly.”