There are no new truths, but only truths that have not been recognized by those who have perceived them without noticing. - Hannah Arendt

It was mathematics, the non-empirical science par excellence, wherein the mind appears to play only with itself, that turned out to be the science of sciences, delivering the key to those laws of nature and the universe that are concealed by appearances.

Kant ... discovered “the scandal of reason,” that is the fact that our mind is not capable of certain and verifiable knowledge regarding matters and questions that it nevertheless cannot help thinking about.

The most radical revolutionary will become a conservative the day after the revolution.