Age in itself gives substance — what has lasted becomes a thing worth keeping. An older poem's increasing strangeness of language is part of its beauty, in the same way that the cracks and darkening of an old painting become part of its luminosity in the viewer’s mind.

To plunge one thing into the shape or nature of another is a fundamental gesture of creative insight, part of how we make for ourselves a world more expansive, deft, fertile, and startling in richness.

Evolution tells us how to survive; art tells us how it's possible still to live even while knowing that we and all we love will someday vanish. It says there's beauty even in grief, freedom even inside the strictures of form and of life. What's liberating isn't what's simplest; it's the ability to include more and more shadows, colors and possibilities inside any moment's meeting of self and world.

Each poet probably has his or her own cupboard of magnets. For some, it is cars; for others, works of art, or certain patterns of form or sound; for others, certain stories or places, Philip Levine's Detroit, Gwendolyn Brooks's Chicago, Seamus Heaney's time-tunneled, familied Ireland.

What we want from art is whatever is missing from the lives we are already living and making. Something is always missing, and so art-making is endless.