Whatever Nature has in store for mankind, unpleasant as it may be, men must accept, for ignorance is never better than knowledge.

数学是一门活生生的学科，随着新思想的出现而不断发展。

当你没有看到这朵花时，这朵花和你的心一起归于寂静；当你看到这朵花时，这朵花的颜色便立刻鲜明起来，由此可知这朵花并不在你的心外。

Gather ye rosebuds while ye may,Old time is still a-flying,And this same flower that smiles today,Tomorrow will be dying.