From an article I read a few weeks ago in the excellent periodical Dappled Things. It brought to mind a quote from Saint Augustine which I’ve included as well.
Dreams are shadowy, dark birds. They are present as a sign of possibility and longing, a searching grasp for a definite reality beyond this one, and yet they remain achingly frustrating because they are forever beyond our grasp. Kierkegaard refers to it as the “dizziness of freedom,” like looking into a great abyss and seeing endless possibility. If human beings are mere animals only made for this physical world, we would not dream, we would not create, and we would not suffer from nostalgia.
This is why art exists, to express the possibility and greatness of the human being. We are made to live in a world beyond this one and we stretch out to discover it. Aristotle defines poetry as the language of what might be and what should be. It cannot help but proceed by analogy, by dreaming, and by nostalgia.
You are great, O Lord, and greatly to be praised: great is your power and your wisdom is without measure. And man, so small a part of your creation, wants to praise you: this man, though clothed with mortality and bearing the evidence of sin and the proof that you withstand the proud. Despite everything, man, though but a small a part of your creation, wants to praise you. You yourself encourage him to delight in your praise, for you have made us for yourself, and our heart is restless until it rests in you. – The Confessions of St. Augustine, Book I.