"The past is a foreign country; they do things differently there."

就像虎的外形好画，虎的骨骼难画一样，人的外表好认，人心却难了解。

To be modern is to be in constant dialogue with tradition.

When someone is nasty， rude， hateful， or mean with you， pretend they have a disease. That makes it easier to have empathy toward them which can soften the conflict.

The history of mathematics is a history of human thought and progress.