You are the author of your own story.
If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."
物理学和数学之间的界限并不像人们想象的那么清晰。
"I am not interested in the beautiful, I am interested in the true."