Human development is a form of chronological unfairness, since late-comers are able to profit by the labors of their predecessors without paying the same price.

We could hardly believe that after so many ordeals, after all the trials of modern skepticism, there was still so much left in our souls to destroy.

Every man who has lived for fifty years has buried a whole world or even two; he has grown used to its disappearance and accustomed to the new scenery of another act: but suddenly the names and faces of a time long dead appear more and more often on his way, calling up series of shades and pictures kept somewhere, "just in case," in the endless catacombs of the memory, making him smile or sigh, and sometimes almost weep.

The liberty of the individual is the greatest thing of all, it is on this and this alone that the true will of the people can develop.

History knocks at a thousand gates at every moment, and the gatekeeper is chance. We shout into the mist for this one or that one to be opened for us, but through every gate are a thousand more. We need wit and courage to make our way while our way is making us.

Science even more than the Gospel teaches us humility. She cannot look down on anything, she does not know what superiority means, she despises nothing, never lies for the sake of a pose, and conceals nothing out of coquetry. She stops before the facts as an investigator, sometimes as a physician, never as an executioner, and still less with hostility and irony.

We think the purpose of a child is to grow up because it does grow up. But its purpose is to play, to enjoy itself, to be a child. If we merely look to the end of the process, the purpose of life is death