只有为别人而活，生命才有价值。
Only a life lived for others is a life worthwhile.
The worst blindness is the blindness of those who do not want to see.
历史不仅仅是过去的记录，也是反映现在的镜子。
Memory can make a thing seem to have been much more than it was.
You don't have to be a mathematician to have a feel for numbers.
To understand the future, one must first understand the past.
A philosophical problem has the form: 'I don't know my way about.'