历史给我们的教训是，人们从来都不知道汲取历史的教训。
History taught us is that people never know learn the lessons of history.
Growth is painful, but nothing is as painful as staying stuck.
最有趣的艺术是提出问题的艺术。
Spend each day trying to be a little wiser than you were when you woke up.
The human being is not a thing among things; things determine each other, but the human being is ultimately self-determining.
Emotions are biological signals that prepare the organism for action.