“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.”

“We do not yet trust the unknown powers of thought. Whence came all these tools, inventions, book laws, parties, kingdoms? Out of the invisible world, through a few brains. The arts and institutions of men are created out of thought. The powers that make the capitalist are metaphysical, the force of method and force of will makes trade, and builds towns.”

“Man carries the world in his head, the whole astronomy and chemistry suspended in a thought. Because the history of nature is charactered in his brain, therefore he is the prophet and discoverer of her secrets. Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.”

“Every man is not so much a workman in the world as he is a suggestion of that he should be. Men walk as prophecies of the next age.”