The joy of discovery in mathematics is unparalleled.
时间没有分界线来标记它的流逝，从不会有雷暴或号角声宣告新的月份或年份的开始。
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
