Gabriel Garcia Marquez, the famous Colombian writer and Nobel Prize winner, has retired from public life due to terminal cancer. He sent a farewell letter to express how he would live differently if given more time. Over several locations, he shares lessons learned - to be thoughtful in speech, dream more, help others in need, express love to friends and family, and tell loved ones how much they mean before it's too late. He encourages readers to show appreciation for others now rather than regretting missed opportunities.