All our knowledge merely helps us to die a more painful death than the animals that know nothing. A day will come when science will turn upon its error and no longer hesitate to shorten our woes. A day will come when it will dare and act with certainty; when life, grown wiser, will depart silently at its hour, knowing that it has reached its term.

In the world which we know, among the different and primitive geniuses that preside over the evolution of the several species, there exists not one, excepting that of the dog, that ever gave a thought to the presence of man.

I have done what I could do in life, and if I could not do better, I did not deserve it. In vain I have tried to step beyond what bound me.

We can never judge a soul above the high water mark of our own.

The living are just the dead on holiday

The manner in which the hours of freedom are spent determines, no less than labor and war, the moral worth of a nation.

If the bee disappeared off the face of the earth, man would only have four years left to live.