你无法改变生命的长度，但你可以改变它的宽度和深度。
"You can't do anything about the length of your life, but you can do something about its width and depth."
The task must be made difficult, for only the difficult inspires the noble-hearted.
人类活动正在成为一种强大的地质力量。
Sometimes a thing is broken and cannot be put back together.
解释：向外物游览就要要求外物的完备，向自己内心求取，则能充实完善自身。
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.