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

Happiness is not an ideal of reason, but of imagination.

HAPPINESS, IDEAL OF REASON

Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.

HAPPINESS, HOW WE MAKE OURSELVES HAPPY

KNOWLEDGE, ALL OUR KNOWLEDGE BEGINS WITH SENSES