Wiping away the past

My wonderful yoga teacher G used a nice analogy in yesterday's yoga class, which focused on ujai, or victorious, breath, in which you constrict your airway and drag your breath through it audibly, sustaining inhalations and exhalations in equal duration. She said, "Imagine your breath as a windshield wiper, with each pass erasing the breath before it." The object: to stay in the present.