呵呵,楼上的意思很接近,可惜不是原话.
原话应该是：“.As you grow older you will discover that you have two hands. One for helping yourself, the other for helping others.”
一整句原话：“Remember, if you ever need a helping hand, you'll find one at the end of your arm. . . . As you grow older you will discover that you have two hands. One for helping yourself, the other for helping others."
楼主可参考一下的链接,赫本的语录集.