1 No ideas but in things (William Carlos Williams)
2. first thought best thought (Allen Ginsberg)
3. Poetry is eradication of personality (T. S. Eliot)
#1 He was trying to move away from empty philosophizing but poets have taken this too literally. The result is diminishment and impoverishment of poetry.
#2 This idea as much as any makes most poetry unreadable, and why wouldn't it, since it favors the ego of the writer (first thought is going to be ego's thought) over the interests of the reader?. And poetry has a big problem with readers: getting them and keeping them
#3. Doesn't the poet have enough on her table without also having to do away with personality? It's not that we want to see personality in the poem or story. but the idea planted in the writer's mind that he must eradicate personality can easily shrink the writer into a soulless sterility..