Good and evil are inextricably combined, and one cannot be had without
the other. The sum total of the enregy in this universe is like a
lake; every wave inevitably leads to a corresponding depression. The
sum total is absolutely the same; so to make one man happy is to make
another unhappy. External happiness is material and the supply is
fixed; so not one grain can be had by one person without taking from
another. Only bliss beyond the material world can be had without loss
to any. Material happiness is but a transformation of material sorrow.
Those who are born in the wave and keep in it do not see the
depression and what is there. Never think you can make the world
better or happier. The bullock in the oil mill never reaches the wisp
of hay tied in front of him; he only grinds out the oil. So we chase
the will-o'-the-wisp of happiness, which always eludes us, and we only
grind nature's mill, then die merely to begin again. [...] When man
finds that all searching for happiness in matter is nonsense, then
-- Swami Vivekananda in "Inspired Talks"