Lectures on Philosophy
The desire for light produces light, there is true desire when there is effort of attention. It is really the light that is desired when any other mobile is absent. Although the efforts of attention were for years apparently sterile, one day, a light exactly proportional to those efforts will flood the soul. Each effort adds a little more gold to a treasure that nothing in the world can subtract.
Simone Weil (1909-1943) Lectures on Philosophy.