May you live your life as if the maxim of your actions were to become universal law.
In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so.
Happiness is not an ideal of reason, but of imagination.
Religion is the recognition of all our duties as divine commands.
Seek not the favor of the multitude; it is seldom got by honest and lawful means. But seek the testimony of few; and number not voices, but weigh them.
All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.
I had therefore to remove knowledge, in order to make room for belief.
But although all our knowledge begins with experience, it does not follow that it arises from experience.
Metaphysics is a dark ocean without shores or lighthouse, strewn with many a philosophic wreck.
It is not necessary that whilst I live I live happily; but it is necessary that so long as I live I should live honourably.