Gabriel Garcia Marquez, a renowned Colombian writer and Nobel Prize winner, has retired from public life due to terminal cancer. He sent a farewell letter to friends expressing his regret that he does not have more time and sharing lessons he has learned. He encourages expressing love and appreciation for loved ones while time remains, as tomorrow is not guaranteed. The letter conveys Marquez's sorrow at his condition but also offers moving advice to live fully and tell others how much they mean.