I'm living life right now, man. This ain't no dress rehearsal.
The circumstances of the world are continually changing, and the opinions of man change also; and as government is for the living, and not for the dead, it is the living only that has any right in it.
追求数学知识是一段永无止境的旅程，充满了无尽的好奇和惊奇。
We must keep learning to keep up with the times.