Justice is the very last thing of all wherewith the universe concerns itself. It is equilibrium that absorbs its attention.

Happiness will never be any greater than the idea we have of it.

(there is) no other means of escaping from one's consciousness than to deny it, to look upon it as an organic disease of the terrestrial intelligence - a disease which we must endeavor to cure by an action which must appear to us an action of violent and willful madness, but which, on the other side of our appearances, is probably an action of health. ("Of Immortality")

An act of goodness is of itself an act of happiness.

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.

To be good we must needs have suffered; but perhaps it is necessary to have caused suffering before we can become better.

Physical suffering apart, not a single sorrow exists that can touch us except through our thoughts.