Every man has a right to risk his own life for the preservation of it.

Jean Jacques Rousseau
Profession: Philosopher
Nationality: Swiss

Some suggestions for you :
Gratitude is a duty which ought to be paid, but which none have a right to expect.
I would rather be a man of paradoxes than a man of prejudices.
Remorse sleeps during prosperity but awakes bitter consciousness during adversity.
He who is slowest in making a promise is most faithful in its performance.
The world of reality has its limits; the world of imagination is boundless.
The English think they are free. They are free only during the election of members of parliament.
I hate books; they only teach us to talk about what we don't know.