All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?
Every man is to be respected as an absolute end in himself: and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.
Intuition and concepts constitute... the elements of all our knowledge, so that neither concepts without an intuition in some way corresponding to them, nor intuition without concepts, can yield knowledge.
The desire of a man for a woman is not directed at her because she is a human being, but because she is a woman. That she is a human being is of no concern to him.