A leader has the vision and conviction that a dream can be achieved. He inspires the power and energy to get it done.

The beauty of theoretical physics lies in its ability to describe the universe with a few simple equations, revealing the underlying simplicity beneath the apparent complexity.

有时候生活会用砖头打你的头，但不要失去信心。

数学的本质在于它的自由。

"The poem is a place where the unsayable can be said."