你必須相信世界的真實性和其中人們的真實性。
You have to believe in the reality of the world and the reality of the people in it.
禮貌，并不需要花錢。用完馬桶后，把馬桶蓋放下；上電梯時，耐心等別人出來再進去；把購物車放回指定區(qū)域；在借東西時，歸還時要東西的狀態(tài)要比你借的時候還要好（例如給車加滿油、把物品清理干凈）。
Collaboration across borders is essential—no single nation holds all the answers to global food security.