An archaic redressing:

Acme of arid pediment,..
nadir of lowest point,..
It won't be long—
What was expected
in that (short) time?
I will write
on anything.

"And I'll come to you
before all them are taken..."
"with genial, affable strode
of lessons learned lightly but well..."

"You don't know;
you can't say...
You don't say."

it means I love her.