The only limit to your impact is your imagination and commitment.

The past is always changing, because we are always changing our relationship to it.

凡事天下要考察有无的原则，必定是以众人的耳目所见所闻的实情以知有与无来作为标准的。 

没有道德或不道德的书，只有写得好或写得差的书。

最好的领导方式是真实。