Knows how to forget — Neglection

Knows how to forget! 1
But could It teach it?
Easiest of Arts, they say
When one learn how

Dull Hearts have died 5
In the Acquisition
Sacrificed for Science
Is common, though, now-

I went to School 9
But was not wiser
Globe did not teach it
Nor Logarithm Show

"How to forget"! 13
Say-some-Philosopher!
Ah, to be erudite
Enough to know!

Is it in a Book? 17
So, I could buy it-
Is it like a Planet?
Telescopes would know-

If it be invention 21
It must have a Patent.
Rabbi of the Wise Book
Don't you know?
(F.391/J.433)
[1] forget:: to neglect wilfully, take no thought of, disregard (OED 4). how to forget:: the way to neglect, ignore.
[2–4] Easiest of Arts:: neglection is the easiest in the learned people.
[5–8] Dull Hearts:: dull people who ignore in their learning.
[23, 24] Rabbi, Wise Book:: a Jewish doctor of the law, who would neglect other law and ritual.