The hardest thing to explain is the glaringly evident which everybody had decided not to see.

有喜怒哀乐之情却没有发作，这是从凡人之心直接追溯到道德之心，使人们存心修养；虽未发生但却有喜怒哀乐的表现，这是由道心指出人心的缺欠，要人们反省改正。

Quantum mechanics is not just a theory about the world, it is a description of the world at its most fundamental level.

Strategy is about setting yourself apart from the competition. It's not a matter of being better at what you do – it's a matter of being different at what you do.

生命不止，奋斗不息。

The PAC learning framework provides a formal way to quantify the learnability of a concept class.

You cannot swim for new horizons until you have courage to lose sight of the shore.