Along the running path, they have learned how significant the presence of each other in their life is. Their breathing and footsteps became essential to each other to reach another second faster and another meter farther. They have promised each other to live another day with their entire heart every day despite them never spelling it out. There was someone in their life whose existence was certain. He was always there, and they will never ask why until the moment he slipped and fell on the terrain of life. They grabbed his hand, but he let go. He doesn't even say goodbye. After he left, life have to move on. They believe the memory of him will never be washed away by time. They knew he was there in the finishing line, waiting for them. His existence was still certain as far as heaven and as close as the heart. Suddenly people realized life is invaluable. Appreciate it, and live meaningfully. Would you run together with me?