To say that a necessary condition for the writing of these words is the willing of the author to write them, and to say that a necessary condition for the writing of them is a certain state and configuration of the material of his brain, these two statements are probably merely two ways of saying the same thing.
~ Alfred James Lotka (born: 1880-03-02 died: 1949-12-05 at age: 69) Elements of Physical Biology 1925, page 403