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

Seek not the favour 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.

Thoughts without content are empty, 

intuitions without concepts are blind.

It is beyond a doubt that all our knowledge begins with experience.

But although all our knowledge begins with experience, 

it does not follow that it arises from experience.

Happiness is not an ideal of reason, 

but of imagination.

To be is to do.

Experience without theory is blind, 

but theory without experience is mere intellectual play.

Nothing is divine
but what is agreeable to reason.

Metaphysics is a dark ocean without shores or lighthouse, 

strewn with many a philosophic wreck.

All our knowledge begins with the senses, 

proceeds then to the understanding, 

and ends with reason. 

There is nothing higher than reason.

Science is organised knowledge. 

Wisdom is organised life.