I felt excited when I read this paragraph during my youth years. Today, the paragraph still serves as a reminder. That is, I should not waste time, my precious life, on trivial in life.
“Man’s dearest possession is life, and it is given to him but once. He must live so as to feel no torturing regrets for years without purpose, never know the burning shame of a mean and petty past; so live that, when dying, he can say: all my life, all my strength were given to the finest cause in all the world…” — Karl Marx
“Man’s mind stretched to a new idea, never goes back to its original dimensions.” –O.W. Holmes