the greatest use of life is to spend it for something that will outlast it
（解释含义）A meaningful saying goes that “The greatest use of life is to spend it on something that will outlast it”. Simple as the saying is, the message it conveys is profound and thought-provoking. Evidently, it is meant to tell us that we should have grand goals in our life and that we should not be contented with material comfort in this life.
（举例说明）Actually, history abounds with examples to prove this saying. Taking a look around, we can also find examples too many to enumerate. Here I can think of no better illustration of the proverb than the people working for space exploration at home and abroad. They may not have that much comfort as we have, and most of them are even unknown to us. Some even sacrificed their lives for the career they pursued. But their work is indeed meaningful, and they will be remembered by history, because what they do are in the interest of mankind as a whole.
（我的做法）Bringing what has been discussed into a conclusion, we may say that a life devoted to a great cause beneficial to mankind is really meaningful. Personally, I would like to work harder in my own field of study, that is, the relationship between China and America. I would like to find out ways to eradicate misunderstanding and build mutual trust between the two nations. In a word, I truly understand the profound meaning of the proverb and I would take the right actions in my life and work in the future.