It is disastrous to the deep sexual life.

But perhaps that is what we want.
When humanity comes to its senses it will realize what a fearful Sodom apple our understanding is.

What terrible mouths and stomachs full of bitter ash we've all got.

And then we shall take away "knowledge" and "understanding," and lock them up along with the rest of poisons, to be administered in small doses only by competent people.
We have almost poisoned the mass of humanity to death with _understanding_.

The period of actual death and race-extermination is not far off.