How these develop is the poetry. It's in responding to what has been written, feeling it, understanding it, extending its possibilities with imagination, honesty and sensitivity. But that means very fine discriminations. Verbal originality, wide sympathies, generosity of heart and a compassion for the human condition are essential for poetry, but they are nothing without extended toil. Poetry trains the character needed to be an artist, the infinite capacity to be honest and take pains.
Poetry also calls for self-criticism, which becomes essential as a writer's talents develop.
L iterary criticism hones many skills, and those which the practising poet needs are close reading, explication and evaluation. And the first two because poems commonly fail through lack of care. The originating emotion still clots the lines or, in striving for originality, the work becomes muddled, pretentious or incoherent. The incomprehensible can always be taken for the profound of course, and much no doubt gets published for that reason, but only the beginner will see publication as the sole purpose of writing. The starting point of criticism is the analysis of the reader's or listener's response.