All our knowledge begins with the senses...

It is often necessary to make a decision on the basis of knowledge sufficient for action but insufficient to satisfy the intellect.

Notion without intuition is empty, intuition without notion is blind.

[A ruler is merely] the trustee of the rights of other men and he must always stand in dread of having in some way violated these rights.

All trades, arts, and handiworks have gained by division of labor... Where the different kinds of work are not distinguished and divided, where everyone is a jack-of-all-trades, there manufactures remain still in the greatest barbarism.

Melancholy characterizes those with a superb sense of the sublime.

In the kingdom of ends everything has either a price or a dignity. Whatever has a price can be replaced by something else as its equivalent; on the other hand, whatever is above all price, and therefore admits of no equivalent, has a dignity. But that which constitutes the condition under which alone something can be an end in itself does not have mere relative worth, i.e., price, but an intrinsic worth, i.e., a dignity.