The challenge of leadership is to be strong, but not rude; be kind, but not weak; be bold, but not bully; be thoughtful, but not lazy; be humble, but not timid; be proud, but not arrogant; have humor, but without folly.

The writer is delegated to declare and to celebrate man's proven capacity for greatness of heart and spirit—for gallantry in defeat, for courage, compassion and love. In the endless war against weakness and despair, these are the bright rally flags of hope and of emulation.

能量守恒定律不仅是一条经验法则，更是思维的必然要求。

True innovation happens when you question the assumptions everyone else accepts.

数学证明的优雅在于它的简洁和清晰。

在领导力中，谦逊是一种力量，而不是弱点。