Poetry has the virtue of being able to say twice as much as prose in half the time and the drawback if you do not give it your full attention of seeming to say half as much in twice the time.
A public expectation it has to be said not of poetry as such but of political positions variously approvable by mutually disapproving groups.
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On July 26 1916 I announced to all my friends in America that from now on I resolved to write no more poems in the classical language and to begin my experiments in writing poetry in the so-called vulgar tongue of the people.