Mark Twain once said, "The most mysterious part of this Universe is ourselves". I bet he's true regarding to this. Life. If I were to be asked to define life, I'd say: life is short. Life is... like a brief candle (William Shakespeare) and life is awesome. Full of excitement, happiness and contentment; yet destructible, fragile and short. Very short.
And since it is very short, it's important for us to make full use of it. Not just fooling around and laughing, but thinking of gaining something that can help humanity as a whole. Life is not just about taking what is needed, but it is also giving. The true value of life is giving, as how Saiful Islam puts it.