Immanuel Kant

Always recognize that human individuals are ends, and do not use them as means to your end. 

Immanuel Kant

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason. 

Immanuel Kant 

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? 

Immanuel Kant 

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us. 

Immanuel Kant 

But although all our knowledge begins with experience, it does not follow that it arises from experience. 

Immanuel Kant 

Experience without theory is blind, but theory without experience is mere intellectual play. 

Immanuel Kant 

By a lie, a man... annihilates his dignity as a man. 

Immanuel Kant 

A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose. 

Immanuel Kant 

Act that your principle of action might safely be made a law for the whole world. 

Immanuel Kant 

Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: 'War is bad in that it begets more evil than it kills.' 

Immanuel Kant