G. Stanley Hall,
Senescence, the Last Half of Life
(1922)
“ The will-to-live, the struggle for survival, the élan vital, libido, etc., are only new names given to the impelling forces of the growth-urge in its higher stages; but these have become types and symbols, if a bit anthropomorphic, of all the more basal and earlier processes by which the homogeneous tends to differentiate itself. Thus we may conceive the universe as being from the first in labor to produce life. Everything that lives hungers to do so more intensely and as for man “’tis life of which our nerves are scant, more life and fuller—that we want.” ”
