樂觀的意義包含面朝太陽、雙腳往前移動。
過去有許多黑暗時刻，讓我對人性的信心面臨嚴重的挑戰，
但我不願也不能讓自己絕望。
Part of being optimistic is keeping one’s head pointed toward the sun, one’s feet moving forward. There were many dark moments when my faith in humanity was sorely tested, but I would not and could not give myself up to despair.
納爾遜‧曼德拉，前南非總統