... c'est la magie de la constance, la plus difficile et la plus rare de nos vertus. - Denis Diderot

The first oath sworn by two creatures of flesh and blood was at the foot of a rock that was turning into dust. They called upon the heavens (which are never the same from one instant to the next) to witness their constancy. Although everything inside them and outside of them was changing, they believed their hearts to be immune to change. Oh children! You are still children…

The purpose of an encyclopedia is to collect knowledge disseminated around the globe; to set forth its general system to the men with whom we live, and transmit it to those who will come after us, so that the work of preceding centuries will not become useless to the centuries to come; and so that our offspring, becoming better instructed, will at the same time become more virtuous and happy, and that we should not die without having rendered a service to the human race in the future years to come

What does one say to somebody who says: ‘Whatever the sum total of the elements I am composed of I am still one entity. Now one cause has only one effect. I have always been one single cause and I have therefore only ever had one effect to produce. My existence in time is therefore nothing more than a series of necessary effects’?