Knows how to forget!

433 Knows how to forget! But could It teach it? Easiest of Arts, they say When one learn how Dull Hearts have died In the Acquisition Sacrificed for Science Is common, though, now— I went to School But was not wiser Globe did not teach it Nor Logarithm Show "How to forget"! Say—some—Philosopher! Ah, to be erudite Enough to know! Is it in a Book? So, I could buy it— Is it like a Planet? Telescopes would know— If it be invention It must have a Patent. Rabbi of the Wise Book Don't you know?