In moments of great grief, thatís where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.
Act as if the maxim of your action were to become through your will a general natural law
To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact
It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.
I have had good experience and trial of this world...I know what it is to be a subject, what to be a sovereign, what to have good neighbours, and sometimes meet evil willers. I have found treason in trust, seen great benefits little regarded.
The heart has its reasons which reason knows not.
All that we see or seem is but a dream within a dream.
The absent are never without fault, nor the present without excuse.
A friend to all is a friend to none
All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.
Adapt what is useful, reject what is useless, and add what is specifically your own.
Take care of the pieces well. The whole will take care of itself.
Thoughts without content are empty, intuitions without concepts are blind.
Share our similarities, celebrate our differences.
Stubborn and ardent clinging to one's opinion is the best proof of stupidity.
Blessed are they who hunger and thirst for righteousness for they shall be satisfied.
In order to change the world, you have to get your head together first
Science is organized knowledge. Wisdom is organized life.
Experience keeps a dear school, but fools will learn in no other.
Wisdom is not the product of schooling, but of the lifelong attempt to acquire it.
Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.