I think all people would like to feel that they’re a necessary part of life. That they’re necessary in the world, and that life would be poorer if they weren’t in it. When you accomplish something, when you write good poetry, then I think you feel that the world would be slightly different if you weren’t in it. And that, I think, is part of what being needed is about.
Think of a word as a pendulum instead of a fixed entity. A word can sweep by your ear and by its very sound suggest hidden meanings, preconscious associations. Listen to these words: blood, tranquil, democracy. You know what they mean literally but you have associations with those words that are cultural, as well as your own personal associations.