We prefer Freud's _Sex_ to Jung's _Libido_ or Bergson's _Elan Vital_.

Sex has at least _some_ definite reference, though when Freud makes sex accountable for everything he as good as makes it accountable for nothing.
We refuse any _Cause_, whether it be Sex or Libido or Elan Vital or ether or unit of force or _perpetuum mobile_ or anything else.

But also we feel that we cannot, like Moses, perish on the top of our present ideal Pisgah, or take the next step into thin air.

There we are, at the top of our Pisgah of ideals, crying _Excelsior_ and trying to clamber up into the clouds: that is, if we are idealists with the religious impulse rampant in our breasts.

If we are scientists we practice aeroplane flying or eugenics or disarmament or something equally absurd.
The promised land, if it be anywhere, lies away beneath our feet.